Geez, the fuss about the Dryads. They have awesome abilities, and they are FUN to play with. As an unit in the hands of the AI, they are not such a threat(will be the first to die anyway). They can cast their stuff (under Ai control)which can be countered (mass dispell?) and that's pretty much it. I'm much more concerned by the dragons, in fact. Since the AI does not have the ability to come here on the forum and whine about units and OUR cheap tactics we use against it, i'm not concerned about the whole 'imba' issue.
Hypnosis+Sacrifice is imba. Resurrect is imba. Mana-harvesting is imba.Poison cloud+mana spring is imba. Half our skills are imba. Using the Spirits of Rage is imba (AI doesn't have Spirits, sigh

).
Completing the game on impossible with ZERO losses is imba. Then, one can argue that half the game is 'imba'.
Play the game, have fun, gimme a break.