anything but fire. shadow magic, holy magic, death magic all of that would be preferable for treants except fire. jeeez.
Actually since now we can create Night Elf Warlock, with "fire' destro spec, with that fire skin and some fire gear and fire mount you could look very cool in game.
Frandal should be there to see this.
I guess not all teldrassil druids went up in smoke...