I played now about 20 Games, mostly on prince difficulty, because it says, that the game is balanced and the AI doesnt get any advantages.
But what happens every game is, that 1 AI Player becomes much more powerful than any other, wipes all out, and in the end is attacking me.
I have 2 Problems with this "strategy" :
1. All games are the same, in the end, there is noone to trade with except the mega-aggro-AI.
2. I tried this myself, played superaggressiv and wiped everything out, that was in range, but i couldnt manage this size of my civ.
But when the AI does, it has high happiness, high income, high techs, and everything is runnig well for them.
In my last game, Russia controlled ~30 cities, had a more happy population and even more social politics than me (king-difficulty).
To me it seems, that the AI is definitely cheating in some way.
But if Im doinig something wrong, please tell me.