GazOCee. GazOCee. With my non-specialist vassals I can choose between vassal, tributary and specialist vassal, but when the vassal starts with a specialization the only option I get is to switch them to another specialization. Meaning if you dont win fast enough, you can actually lose against it due to ticking warscore. Though since 3. Now I'm paying them 30% of my resources putting me in the negative. Navigate to the Propose Subjugation option. It depends on what you want from them. 1; 1; Reactions: Reply. Method 2: Demanding Vassalization. Copyright © 2016 Paradox Interactive AB. This pairs quite. watching the Overlord multiplayer stream (mostly Montu) and I was wondering what exactly the difference is between a tributary vs a standard vassal in the upcoming patch. Even with constant resource gift, the AI still have trouble building their planets. In the second game I tried to tributary the aliens. After that, you. As a hegemony leader you can just kick them out when you want, let your other tributaries swarm them, so you can annex or vassalize them. Infact, do a tributary war to start with, the easing down from tributary to specialized. The new empire that's created as a result of Liberation has a large bonus to their opinion towards you because of the Liberation, so you should be able to vassalize immediately. Vassals can be lawful or the opposite in which case they will rebel if given the opportunity. 2. After that, you propably want to have Vassals for the Fleet Cap, Reserach Exchange and Unity. Reply . A vassal state is any state that has a mutual obligation to a superior state or empire, in a status similar to that of a vassal in the feudal system in medieval Europe. Nov 21, 2023Vassal or tributary? SirAlexius Dec 22, 2018 Jump to latest Follow Reply Is it better to vassalize other empires or make them tributaries?Tributaries also seem to be of more use early, as the couple dozen energy/minerals still make a difference, while vassals are better lategame when they. This is basically creating vassals, letting them grow pops for awhile, and then re-integrating them. Tributaries are not your subject, they are independent, can expand freely and you can have pacts with them. Overlord aims to offer more control over your empires, both to let you shape them in more specific ways and also to generate more anecdotes when it all goes wrong. ; About Stellaris Wiki; Mobile viewA tributary can't be customized in the same way, and simply pays you a tax of resources to maintain their freedoms. All that said, Protectorates are by far the best subject type to stock up on, for that sweet +0. it. Ergo, you pick neither, and you pick a different vassal type instead- like a. Lots of targets around, claim a few systems, make them a tributary. Since you can do. You can't control them directly-outside of the tribute they owe, they're largely autonomous. Azunai Nov 27, 2017 @ 6:40am. All subject types now grant a small degree of influence, which can be put. And there Make the Tributary or Make the. You can't control them directly-outside of the tribute they owe, they're largely autonomous. SnooStories8859. Rord64 Mar 18, 2018 @ 6:06am. Once it's explored, the two systems with an endpoint for the wormhole become adjacent from your fleet's perspective, so just. As I mentioned, Stellaris is a game where the strong get stronger and the weak fall further and further behind, and this makes vassal-based play a very dubious proposition. No impetus, no drive to do anything. I am wondering what the cause of that is and if there is anything I can do to. Becoming Tributaries Instead of Normal Vassals is Very Frustrating Bankipriel Mar 29, 2023 Jump to latest Follow Reply It is very frustrating after. 385K subscribers in the Stellaris community. Especially since the contribution is percentage based so you benefit from their AI bonuses. ago. Tributary and Vassalize: If you have at least one ally with differing ethics, you can give them war goals that conform to their ethics even if they differ from your own. Saying no to overlord contracts costs them influence, so by spamming the contract of them over and over they eventually run out and have to agree. Create a vassal using the sectors menu (as big or small as you want), the vassal will inherent all your techs and ethics. Unhappy sectors will want to become tributaries. However, vassals do drain your influence and cost even more to integrate. See screenshots for new tradition effects. r/Stellaris • De-tox vs climate restoration. Going by the Blorg stream, vassals work pretty much the same as they do in EU4. However, even after becoming a tributary and having diplomatic freedom, I can't declare war on my overlord as declaring a war againts them need the approval of their. A place to share content, ask questions and/or talk about the 4X grand strategy game Stellaris by Paradox Development Studio. would like to know too!! #1. would like to know too!! #1. But my main desire is the ability to just tweak the mechanics of the existing vassal types, like having a tributary pay me in alloys, or a vassal which can expand without needing me to have a civic. A tributary state is essentially a vassal that has more powers relinquished by the request of its dominant. A 3 planet tributary can give you more than 10 of each. This is good for the overlord, because 50% of X+Y is better than 50% of X, but also helps the tributary stay solvent because the 50% of Y they get to keep is covering the deficit that might otherwise exist if they were just 50% of X. A vassal has still some use, even if their military support is questionable, e. Never rely on them for anything. As Tributary you get a small part of their resources. . When an AI empire is about to declare war it will first. < >The broken part is that you can get any contract, even one with a 75% tax on everything. A tributary turns into a vassal if it has something like 50% of your technologies researched. Vassal: an autonomous empire which has been set up to support its master in military affairs. I have no idea on that. Once you've filled out your specialist roles, this is where most of your vassals end up. The requirements for vassals and tributaries are sick. If you wanted to take vassals one step further there is a great mod that expands possible vassal types to add some interesting choices; for example, the Debtor/Blood tributary vassal types are very unique. The first method involves going to war with a target empire. So Materialist feudal playthroughs can be crazy good. Squeezing the most out of your vassals. I typically vassalize Fallen Empire core worlds and. Vassal taxation levels are too high. Make the feudal society civic kind of useless as no matter how powerful they get and apart from fighting they give you. Subjects have their own budget, construction sector, interest groups, laws, and institutions but are limited when conducting external diplomacy. I just was small, capped by my core planets, but with a good tech and good income. Alien empires ruled by different primary species overlords with xenophobe govts should be more disloyal tooVassal produces 50 engineering, 15% would be 7 (think they round down 7. The benefits of a tributary vs a standard vassal in 3. But okay. Granted I play with mods like Stellaris Evolved and Gigastructures so there's tech at play that is extremely advanced and game changing. And most people play on fast speeds rather than normal. Lets say the overlord produces 100, and so would now be 93 as it is "given" to the vassal. Stellaris. ago. 0 unless otherwise noted. A vassal also run the risk of a full diplomatic integration by their Overlord. EDIT: This is about 1. You will be presented with many options as demands, and “Vassalize” is one of the options. - Changing your subject's name: To do this, I made it so your subject name will change to the name of your Capital system. the game seems to make the war to expel branches of there overlord, which is A) pointless as they aren't a megacorp and B) very. Please help improve this article by adding citations to reliable sources. But the vassals didnt rebel, but someone stronger just declared war on my vassal and kick my ass too. The big barrier that a lot of people on here seem to have is not knowing about the vassal/tributary casus. Your protectorate gets a bonus to researching your techs which may catch them up enough at some point. 5. I think it's common knowledge by now that AI vassal on higher difficulties is basically useless other than neutering a potential rival and prepping…Puppet is a modern term, and usually is just a state with teh same goverment as yours, and that is completly complient to you vassal is a medieval term and usually allows alot of autonomy, depending on the type of vassal it may be, some consider a tributary as a vassal, and some other consider the King of England (also the duke of. bane_howlingmoon Mar 18, 2018 @ 5:42am. If you drop a 600 influence cost vassalage negotiation on current vassal that has only 400 influence in their stockpile, they won't be able to refuse. My vassal Megacorp wasn't even opening branch offices. However, it pays a substantial amount of tribute to its overlord in exchange for protection. If you can win a war against them and get one of them vassalized or made a tributary, you can force them out of the federation and into your collection of subject empires. Subjects were allowed in since that almost costs us a war when the AI did not send the fed fleet in time. 291k. ago. 10. They pay you tribute and that's it. Edit: says cannot build more than one. Ideally you can force them into a tributary if you already are going to invest a lot into military, you get a massive resource boost from doing this to a few empires. Go into the diplomacy tab with the empire you wanna vassalize. Stellaris Wiki Active Wikis. Both can net you additional territory if integrated but otherwise it's just what I listed above. Yeah it's way too easy on lower/scaling difficulties to rush a fleet and mostly peacefully vassalize the entire galaxy before midgame. Two I uplifted so they are 1 system vassals in the middle of my Empire and another I took from a neighboring state and has about four systems and is in the direction I would. 7: 0 to 225 Vassal limited to 45% maximum tax Subsidiary or Tributary cannot receive subsidy;. Casual-Dictator • 1 yr. Previously in Stellaris, subjugation was rarely a more compelling option than simple conquest, and being subjugated often essentially meant a permanent decline of your empire and a “Game Over” screen in your near future. Involuntary protectorates (those forced on by war, or those forced on uplifted species) will not give you +1 influence. The new Vassal mechanics will introduce a slew of new systems that have clearly not b. Even before 3. Prospectorium advantage is that they will get bonus on basic, advance and strategic rerources, has chance to find deposit in space and will never be downgrade to protectorate but get nerf on science production. In essence, a Tributary is a more independent vassal that you cannot really control. Adeiu • 7 yr. Best. To do this method, whoever you’re trying to make your Vassal must be at peace. Now they have more diplomatic weight than they ever had, love me and helped me obliterate an empire. ago. 25% minerals and energy to grow your fleet. Sometimes, vassals are used to help manage large empires, though often suboptimally. I played Stellaris for quite some time now. See screenshots for new tradition effects. There are a few different ways to create vassals in the game. Yes you can´t integrate them but considering how scarce influence can be sometimes, having someone giving energy and minerals isn´t a bad choice. Their trust increases overtime and when they become lawful you don’t have to be anxious about it any more. Would it be better to play as a megacorp and turn everyone into subsidiarys, or play as a regular militant empire, and turn everyone into…Vassal Specializations. I control vast amounts of territory directly and most of my allies asked to become my vassal. If you drop a 600 influence cost vassalage negotiation on current vassal that has only 400 influence in their stockpile, they won't be able to refuse. The +15% resources is a further bonus to your political power at level 5, and in the meantime it means you can get slightly more from vassals in taxes. And with federation DLC the hegemony makes vassals obsolete for puppet master style. Legacy Wikis. In exchange you can take much more from them (75% resources vs 45% from trib to vassal iirc). If you want the extra resources from a vassal with none (or very little) of the headache that comes with loyalty management and specialization, and you don't plan on integrating them either, tributaries. Tributaries The way tributaries are set up in Stellaris, they can be excellent subjects from an economic point of view. picture comment rule 5: looking for advices/discussion about comparing advantages of vassal and tributary, shows current economy output and benefits from subject taxes (top left corner), I'm thinking what is better. So as a weaker empire, you rather want to be inside a hedgemony than be a vassal. Vassal specialist types are suddenly not showing in either the propose subjugation or agreement negotiations menu. For a regular empire, it can happen the other way too -- you start with a Tributary, then it auto-switches to a Protectorate, and then later it auto-switches to a Vassal -- losing your Tributary resource contract entirely, you have to spend Influence to re-negotiate, and whatever you negotiate is thrown away if it swaps into Protectorate again. Currently if you are playing on insane AI difficulty, and then make a vassal, that vassal will NOT benefit from the +100% bonuses. A union is a bit more complicated as it can refer to multiple terms, a political union has five categories. Thread starter Abdulijubjub; Start date Apr 14, 2023; Jump to latest Follow Reply Menu We have updated our Community. Glad I had to work today. Copyright © 2016 Paradox Interactive AB. You're just too far behind. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement. On a side note, IIRC the devs had originally planned to make three different crisis types. That large empire asked to become my vassal and I said yes just to experiment. Are tributaries inside your empire? No. Not as straightforward as directly release as tribute, but. By annexing them as conqueror you get ALL of it! AI was NEVER on pair with a good player without difficulty boost, but right now it is especially weak. I can get the last of my independent neighbors to become my subject. Plus, if you've gotten said protectorate by doing something like. XBOX • 3 yr. Tributary will really boost your economy, so you can put out a lot more research and alloys and have less of your pops mining and energy production. Atunomous vassal gives you freedom to wage your own wars, but not to make. Two ways to get a vassal. My slaves are Gaia world only lol but surely 140 psychic pops can make a good vassal. You can let them be autonomous, but ultimate control of the sector still belongs to the player. Last I checked, there is no means of "upgrading" a Tributary into a Vassal, so you have to defeat, make tributary, sit around and let them continue doing exactly what they've been doing all along except it makes you a little richer, then attack them again in the hopes that they. x. Authors description: Exalted Domination – Vassals And Tributaries. Go to Stellaris r/Stellaris. Now, lets compare it to how far we are with fusion and what there is to know and what problems there are to solve. For a regular empire, it can happen the other way too -- you start with a Tributary, then it auto-switches to a Protectorate, and then later it auto-switches to a Vassal -- losing your Tributary resource contract entirely, you have to spend Influence to re-negotiate, and whatever you negotiate is thrown away if it swaps into Protectorate again. Heck if they like you enough they may even be amicable to becoming a tributary. g. NumberIine. Having a protectorate gives . All Discussions. We would like to show you a description here but the site won’t allow us. Go to Stellaris r/Stellaris • by Lebroso_Xeon. rules pretty harsh now: -must have domination tradision. Though bear in mind, +5% resources with a 15% tax rate is. 84-0. During the 18th century, the Ottoman Empire controlled many vassal and tributary states such as the principalities of Wallachia and Moldavia, or. Strong diplomacy builds should have you covered. I got 1984'd May 7, 2021 @ 4:08am. Granted I play with mods like Stellaris Evolved and Gigastructures so there's tech at play that is extremely advanced and game changing. If you can put the AI into a suitably bad position, they will surrender and thereby cede systems you have not actually conquered. Dynamic difficulty adds a option to apply ai bonuses to vassals. Vassal Corporate overlord Inward Perfection; Within 60% technological difference; A vassal is a subject of another empire, often with little to no self-rule. Have your vassals all follow your doomstack. With the new changes and traditions in 1. Vassalizing empires is definitely my favorite way to win (tied with Rogue Servitors). After that kick someones ass with a goal for liberating a "Rival" Tributary(Your ethos) or a vassal/protectorate/standart tributary and a "Federation" Tributary. If you intend not to conquer said terrain turn to vassal. How to make vassals/tributary. I faced inaccessibility of war for submission (as the vassal or the tributary), I send the offer "To offer the status of protectorate" or "To demand a tribute", any empire refuses (well, on a kraytsny measure while there are no concordants peacefully), then I come into options of declaration of war. Maybe a future content patch or DLC dealing with internal politics (like the Political Events mod) could rework this feature, and add more vassal customization in addition to expanded diplomatic functions (e. Go expansion edicts first, Start claiming planets left and right. Stellaris Wiki Active Wikis. #5. As another poster pointed out, you can vassalize genocidal empires with it. And for the stronger empire, you could benefit from having weak allies, but still stronger-than-vassal allies to aid you. As such, tributaries are better than subsidiaries, so do not pick megacorp for subsidiaries. I guess good vassals would need a proper diplomacy system and a competent AI, both of which Stellaris is unfortunately woefully lacking in. Now your tributary gives you energy and minerals, add part of their naval cap to the federation fleet, and they're pulled into any wars you're involved in, because they count as federation members. vassal turns into a protectorate but without the bonus or influence gain and resets your agreement. ; About Stellaris Wiki; Mobile view Therefore, managing vassals is crucial to the success of your empire in Stellaris. All subject types now grant a small. In exchange you can take much more from them (75% resources vs 45% from trib to vassal iirc). They do lose the difficuilty bonus, yes. But disloyal vassals should also consider : [disloyal power + enemy of overlord (current war) power] > [overlord power + loyal power] -- what better time to rebel, than when your lord is campaigning half a galaxy away?Subsidiary or Tributary must pay at least 30% tax; Advanced Advanced Resources 0 to −45 +3. This is my first game of Stellaris, I turned a sector I conquered into a Vassal early on because they were seriously generating sprawl. If you’re a vassal then theres good news and bad news. tributaries give you a significant portion of their economic output. It was a tributary in a mercantile federation. ago. Both subject types count towards the unity bonus tradition. This will open the vassal contract menu. Cheaper in war score and give monies to you. Exalted Domination – Vassals and Tributaries [3. Tributaries at least give you some basics. The second vassal everyone will want is the Scholarium, who provides a significant bonus to research potential and valuable science tribute. Ascension 1: mastery of nature. usually protectorates never become vassals, since they need 50% of your tech and you can usually out-tech them. Food is minimal, and getting tributary after tributary can cover your economy for the most part. A Workshop Item for Stellaris. Vassal cost 60 (NO MATTER THE SIZE!) while 3 planets cost roughly 90 warscore. Since you can stack anchorage star bases for increased naval cap, and because upkeep costs so much more now, the extra fleet cap from vassals is negligible compared to the extra resources from a tributary. I'm fairly sure I've made allies into vassals or at the very least Dynastic Marriages into vassals, but I'm wondering, after you make a nation a Tributary, can you later make that country a vassal? Just trying to plan my take over of Indonesia as Japan. Vassal is mostly for. Good news is you can choose to do it when ur overlord has just finished a massive war and lost or try and invite some allies into the war. If you can just take all the planets under the war score requirements then just conquer. You basically become…In fact, they managed to wallop the Tuxkans so hard in the last war, not only did they convert a third of the former Tuxkan territory into a friendly vassal state (the Imperium of Berni, in orange-green), but they did so while simultaneously occupying over half the territory of the Holy Adeex Order on their other flank, which used to be allied. 25 Badges. 37 votes, 46 comments. Stellaris Real-time strategy Strategy video game Gaming. Completely eliminating the distinction between the types I think would lead to less interesting gameplay, and make stuff like finding a primitive. Anyone know if/how I can make a mod that will make it so that these AI bonuses still take effect on vassals? It makes little sense that they suddenly become weak cos i made them a vassalCome the late game especially, you'll get far more efficiency out of a resource vassal if you incorporate them and then release them as a vassal than if you skip straight to tributary. min. Vassal being bulwark but without the resources making them even weaker because they would have to compensate themselves towards the basic resources theyd be getting from me. If you want an AI to protect you in exchange of resources, become a tributary, that works perfectly fine in starnet. 3. Correction: Only voluntary protectorates give you influence. The overlord can't curtail their expansion, doesn't interfere in any of. Tributaries are cool. Please help improve this article by adding citations to reliable sources. You can easily rename your capital system, and so, you can easily rename your subjects. Stellaris. Protectorates are tricky because usually the technology gap doesn't exist to create them but I've had luck doing it with newly self-enlightened races. What Is A Tributary Stellaris? In the game Stellaris, a tributary is a vassal state that retains a significant degree of autonomy in its internal and political affairs. The new vassal system lets you specialise subject empires, which then develop handy traits as they level up within the greater empire they're a part of, making that 30% research tax an easy pill. Then (to test) I let them both go. Monetary tribute is 12. By annexing them as conqueror you get ALL of it! AI was NEVER on pair with a good player without difficulty boost, but right now it is especially weak. That said, yes as they currently stand Vassals are incredibly powerful. usually protectorates never become vassals, since they need 50% of your tech and you can usually out-tech them. -100 for vassaling and -100 for something like war at itself. They are all extremely strong perks with them. Making federations baseline and replacing one or two of the points with something vassalization related could go a long way. No big deal, in a current game as evangelizing zealots I’ve got 3 vassals: An ex-primitive empire I enlightened and let occupy the entire far north, a xeno separatist of said ex-primitives that I forcibly subjugated during a galactic war shortly after they gained their independence, and a same-species, two-system fringe sector I made a vassal. There are a few different ways to create vassals in the game. Unless you use AI mod, standard AI either for enemy or ally like vassal have trouble filling their planets with buildings. You have to liberate first, or demand they become your vassal (the domination tree is good for this) as a war goal. It makes changes to what they provide to their overlord. g. 0, Stellaris has undergone a number of major mechanical changes that have decreased the value of conquest. I don't believe that a vassal/tributary can have subjugates themselves so I. You can check the overall relative power by hovering over the 3 bars icon left of the relative fleet power or in the diplomatic contacts list. Overlord will be focusing heavily on the subject of. Cheaper in war score and give monies to you. Vassalise and Make Tributary diplpmacy option avaliable immediately and can be used on equivelant Empires Cannot integrate vassals. The best way to play is to have as close to zero empire size whilst having the biggest science income. AND you can integrate protectorates into your empire. Turns out I got 40 systems or so and 3 inhabited planets. I play tall and use tributaries. Stellaris. Make tributary is a war goal and diplomacy demand. If you don't have the influence to fully claim a large empire, then vassalize -> Integrate will let you absorb them afters some time. ago. The use of vassal states continued. Stellaris Real-time strategy Strategy video game Gaming. They are probably more useful in one of the next patches due to tributary states and maybe some other changes (which is currently missing compared to EU4). Zijkhal • 4 yr. make every three planets above my cap into a new vassal. 2 comments. Rinse and repeat and you'll end up with a bunch of hegemony members with high fleet contribution but also the AI bonuses to economy. Mhh I guess you can lower the mandate requirement by getting war score cost reductions like diplomatic idea, or admin efficiency from admin tech and absolutism but I don't think that you will be able to lower a 300 mandate requirement to less than 100 any time soon without any kind of war. I don't remember if it's tributary or subsidiary, I'm playing megacorp. Without it all vassals are good for are buffer states. Vassals can lead to scenario where your ships have to go through friend space to reach your other owned sectors. Age of Wonders 4 Empire of Sin Cities: Skylines 2 Crusader Kings 3 Europa Universalis 4 Hearts of Iron 4 Hunter: The Reckoning Imperator: Rome Prison Architect Stellaris Surviving Mars Surviving the Aftermath Vampire: The Masquerade Victoria 3. But the tributaries keep rebelling and I need to fight wars of conquest and. Content is available under Attribution-ShareAlike 3. "They may also swear Secret Fealty to one of your rivals in hopes that they’ll be able to follow them in an Allegiance War. 138 Badges. As well as encouraging the spectrum of playstyles Stellaris is otherwise. Tributaries cannot get integrated, so to get you tributary turn into a vassal you need to help them research faster. 806 14. Stellaris Military system needs a rework to make Warfare fun in all stages and with all power discrepancy. The overlord can't curtail their expansion, doesn't interfere in any of their wars (and vice versa), the tributary simply feeds them resources. Also, as a plain vassal I can suck my overlord as a vassal for a 15% subsidy or 1. . Then just wait until they request to be a vassal. The "Vassalize" War Goal and You: A Lesson learned the strange way. Vassal, Subsidiary, Tributary, Protectorate, Bulwark, and so on. ago. Yeah that’s probably one of my biggest sadnesses about stellaris, that you don’t have all that much obvious control over your subject empires, your ideas sound great but I’d also love to have at least a little direct control, like ordering your vassal to protect a specific system or build ships, I don’t like that you basically end up fighting wars alone with just. Not being. But i only have 1 option. vassal vs tributary. 25 influence a month, and you can integrate them if you want. Feudal is also the only way I know thus far that makes a 1 system play through possible. 1 Answer. They get 80% reduced tech costs on every tech you've researched. The integration only took 22 months. 4 we had those two vastly different types of subjugation: Vassals are diplomatically tied to their overlord, they pay a small tribute and get some benefits. 5 influence. You will be presented with many options as demands, and “Vassalize” is one of the options. 70. Else liberate as many planets as you can to split up their empire. It would really make sense if tributary was just a milder form of vasallisation, so that full vasalls pay tributes AND follow you into war while the tributary ONLY pays ressources. but I have over a dozen planets in that. Heck if they like you enough they may even be amicable to becoming a tributary. If you're not domineeringly powerful, vassal is a good choice to set them to follow your ships and act as extra power in most fights. The game is quite. Its not a bug. Claims stuff on a different empire, make them a tributary. They are all extremely strong perks with them. However, having a Hegemony does work better for you for the federation benefits. I've been playing a lot with the feudal civic and having fun but one of my problems is that unless I create the vassal myself I have no idea how to rename the vassal. I recently got into this game, and in my current game I’m playing as a very militaristic empire. 2k. Vassals can be lawful or the opposite in which case they will rebel if given the opportunity. Was trying an idea the other day and I made my vassal contracts 15% basic resources and 15% research to me. Tributaries, unlike vassals, are semi-independent - they pay tribute to their overlord, but are otherwise left alone. Rord64 Mar 18, 2018 @ 6:06am. the fed will break eventually as the other members oppose this. Thread starter Zoroastra; Start date Feb 24, 2022; Jump to latest Follow Reply Menu We have updated our Community Code of Conduct. In cases where the vassal in question is large and rebellious, integration and re-releasing might be prudent. GA with scaling is pretty fun. Seemose • 2 yr. Like Vassal 1 focuses all its invention on making a laser which can heat. I have a big fleet. Since you can stack anchorage star bases for increased naval cap, and because upkeep costs so much more now, the extra fleet cap from vassals is negligible compared to the extra resources from. You can easily rename your capital system, and so, you can easily rename your subjects. What I find works best is to determine what vassal it is then determine what role suits them best. You can't integrate them, you can't prohibit their expansion, you can't limit their diplomatic options, you can't build any holdings and you can't give them subsidiaries as their overlord. Tributary gives you the full freedom, but doesn't give you the GP dev. If you are ok micromanaging, you can incorporate them, gene mod and fix their planets, then release as a vassal again. 30% science generation, for -50% fleet everything. Yes you can´t integrate them but considering how scarce influence can be sometimes, having someone giving energy and minerals isn´t a bad choice. Firstly you need to be a recognised power so you can puppet and not just make a tributary.