Well I personally think that the next GOTM should be at MONARCH and the one after that should be at EMPEROR... then it should rotate between those...
I think that regent is to easy, on this game it was a bad start (not as bad as APOLYTON's 4th Tournament...) but if you played to non-agressive in the start and left the japanese alone, then you would have an hard time later... If you wanna know what I mean read the spoiler thread