surrender screws up the game.  I had the torians surrender then the super powerful mimmots took em up

whenever they surrender they all turn into colonies

as a result the mimmotts take over the galaxy

turn surrender off and fight to last man

either that or change when a civ surrenders like when they are down too a few planets

killing a large portion of their ship force should not make em surrender they can make more

I did take the torian capital

so my advance settings are

no to disable tech trade

no to disable tech brokering whats the difference

yes to disable surrender ai

no to surrendered colonies

yes to fow