I've mentioned this before but I will mention it alone here:
I use AI to test maps and practice strategy. It would be nice if it was a little more difficult. Would it be possible to setup a nightmare mode like warlords used to have?
I think it would be a way to make the AI tougher without reprogramming the AI in its entirety.
Could you code it so after say turn 5 or so, the AI considers all other AI's NPCs or neutrals and only attacks other "players" ie the human.
I like the idea of this playing out at Battlefield or gargantuan or West Illuria where all the AIs are only attacking the human. Might raise the difficulty level but keep the coding to a minimum.
Just a thought, I'm not sure how Steve coded the nightmare mode for Warlords. Maybe you could also "turn off the FOW" for the AI.
Just a thought.
Ken