In my current game (80 planet concentric, 7/7, 2 random ais that ended up being Shield Ninny and something else that doesn't send waves), I have decided to see how many spire cities I can build without being overwhelmed. Seven hours in, I've taken five world, not counting the dyson sphere, and neutered a few others. I plan to play an extremely conservative game until I get the capitol and can start placing cities like there's no tommorow (and if I'm correct on the numbers regarding the AI's response, there might not be). Anyway, is there a cap on how many city hubs can contribute to wave build-up? Also, since each city adds to the intensity and the charge-up time, is it possible in theory to build citie at a rate that keeps th AI always building a wave, but never releasing it?