Stellaris vs. 15 Determined Exterminators with Glavius+Enhanced AI Part 8
First off, this isn't a complete playthrough. I stopped playing the game when i was confident that I was going to win the campaign since it was going to be a slog for me to actually finish the game. Maybe some people would disagree that it was over, but to me I knew that I easily would have enough territory to win the game.
Secondly, this was played with a few mods. I was using Glavius AI and enhanced AI to buff the enemies, a mod that increased the base core systems to 80 because I find managing sectors to be horribly tedious (granted this does buff the player fairly significantly), the direct construction of high tier buildings mod (mostly convenience), and the no clustered start mod (makes starts more consistent - I'd say most of the time this is making the game easier, but it also makes some of the really overpowered starts less overpowered).
I also forced the prethoryn to spawn in 2200, but they didn't end up doing very much - they actually probably made things easier to be honest, but I think something went wrong with their AI somewhere as they seemed to almost completely stop expanding after about 30 years into the game.