This has been discussed before but I'm going to outline the plan before I do it. Elerian's can mind control planets which instantly assimilate into their empire. To do this, I'll make it so that when Elerian unit captures a city the turns the city stays in revolt is deduced to zero. There is an ability that promotions can give that will reduce the change of a city revolt that was never used in the game. I can simply give that a second effect to reduce revolt time, which would save time and work. This could also be used in another way. The Alien Management Center wouldn't work in civ the way it works in MoO because you can't build anything while the city is in revolt. So another way to implement it is to have the alien management center be a building that gives a revolt protection promotion to units built in the city, then with the new effect these promoted units could capture cities and have them stay in revolt for a shorter time. Similar effect implemented differently. Now for governments it would work the same with democracy reducing revolt time and unification greatly increasing it.