MArcomage

You've got to be kidding me giving him Ancient power

It could be partially used against him. Here I go
http://arcomage.net/?location=Replays_details&CurrentReplay=272843&PlayerView=1&Turn=1

I don't see a problem. The AI should take into consideration your stock gain as well and currently it values its own stock less than yours, so it should be likely not to use the Ancient power unless it gains much more resources than you do. Anyway, the AI behaviour can be tweaked some more.