Apologies if this has already been mentioned, couldn't seem to find it anywhere.
The spell Dominion, as given by the Staff of Dominion from the epic Dragon Eye quest thing, is a game-ender (maybe this is intended).
When cast in battle, the battle ends, you get full experience as though the enemy was defeated, and every single unit of the opposing army joins your side. This even works on opposing sovereigns.
It seems to me it should:
1. Only work on dragons.
or
2. Only last the battle, and limit casts per battle.
and maybe even both.