My prefered playstyle is on gigantic maps with 9 AI opponents and slow tech rate. What I usually get is a game that is already "decided" by the time capital ships are being built. What I mean, of course, is that one race -- not always but usually me -- is so far ahead in planets and technology that the game is out of reach for everyone else.
Does anyone have any suggestions to force a more closely contested contest farther into the game? I generally set all AI to Intelligent and use uncommon stars and planets, so that each planet is magnified in importance. If I set the planets to be more common, I tend to outcolonize the other races -- unless I am relegated to a remote corner, in which case a different race ends up overwhelming everyone else.
Suggestions? Fewer AI? Fewer planets? Something else?