Supremacy or Conquest victory

[MOMOMO]

I was wondering what the best way to achieve a supremacy or conquest victory would be? I've already achieved science, economic, and wonder victory. Which race would be best for each type?

[Spencer]

Supremacy is extremely difficult on large and above maps due to the number of controlled planets required increasing much more than the over-colonization limit. Cravers are of course the go-to race for early military snowballing into mass takeovers, but any race can work. UE has some nice bonuses to mitigate unhappiness from mass expansion, Lumeris have flat happiness bonuses, and Riftborn can handle being unhappy much better than other races can.

An interesting thing to note is that you can often end the game much sooner (especially in conquest victory) by researching the alliance tech and allying with half the races on the map. If you ally with the far off races you don't have to bother sending huge fleets that far out and maintaining such a large front. Just take over your neighbors, consolidate, and ally with whoever's home planet you don't own. If someone on the other side of the map is being stubborn then that's just one planet to take over for the win.

[kazjun]

There's also the Vodyani (or anyone you can get the religious party in power) as with their law you can fix happiness to at least content then you can just ignore the over colonization penalty and conquer every system you want.

Edit: They can be slow starters compared to other races though.

[Zero Honour]

I found Vodyani were more dependent on getting lucky with a decent map early on than other races. With a couple of minors nearby early on they can easily go aggro and suppress a neighbour or two.

Anyone with religion can mitigate over-colonisation so cravers/Vod are logical picks - sadly the victory requires a huge number of planets to be owned. Just taking the enemy home is way easier - especially in a 2 player game.

[chaos.satyr]

Vox populi make Vodyani a superior pick. Just survive until your first hero gets it and make sure they are on your capitol city. You will generate an incredible amount of fidsi that will allow you to have wars with two to three factions. Combine that with the law to ignore overcolinization and unhappiness and you will be able to pursue these victories. Granted you will likely get an economic victory first.

[Niebieski]

Today i finish Void (only for ship, love "future" and void got beautiful ship, rift have too nice look ship) Supremacy - my own fraction - just for test, religion + anarchy + (sorry got other language sooo) The law of saints and sinners = not even turn 200 and almost 100% huge belong to me... most enemy planet buy via influence, 75k influ per turn, 330k dust per turn (hard).
But this was the "worst" victory, boring like hell... but for ur own fraction take anyone and you win (hate lumeris ship, ugly ship).