[Zooko]

Sorry to be unclear. What I want the AI mods to do is just to control the behavior of units in battle. For example, if I've loaded Zen's Battle Mage AI Mod, then whenever my battle mages have no specific battle commands, they don't do the normal battle mage AI implemented by Illwinter, but instead execute the code from Zen's Battle Mage AI Mod to determine what they should do.

This would presumably make mages more powerful in battle as the modsters figured out better and better AI's.

Does this sound like a sensible notion?

The other thing that I mentioned is that the player might be able to select among mods on a per-unit basis. For example, as a "general action" instead of Cast Spells, Attack or Retreat, you might have "do as Such-And-Such Mod says to do" button.