I'm a bit confused how (or even if) you can pick AI difficulty in multiplayer games. My friend and I aren't keen on the mad clickfest that MP wars turn into, so we sometimes play some 2 on 2 games, us against AI. In the game lobby, we can each pick our own difficulty (which is odd - it must only affect various bonuses/penalties?) but the AI slots don't have any difficulty setting. They don't seem very hard in game, so do they just default to Prince or something?