Gandalf,
What I meant was player-controlled blacklists/hint lists. I've watched Dom3 think; that's one reason I think it's a good job.
The problem, of course, is that the AI doesn't know what the player is trying to do. It's trying to optimize a situation it doesn't really understand, so it gets it wrong sometimes (like the recent thread on it making archers and mages berserk).
I'd really like a GUI/configuration file to be able to say, "No, please don't cast this spell in this battle." or "Yes, you may use a pearl to cast Power of the Spheres even against weak opponents, but don't use pearls for anything else.". Really, I want that. Double pretty-please with the devs' favorite sweets on top.