Transmuters get haste, and adrenal burst or something like that, plus a even combat addition as far as making them fight better. Add on the fact that they can slow the warrior, and then maledict the warrior, Transmuters make warriors crumble. The only real way to beat a transmuter is make sure he doesn't cast. Lagging them, and getting in as much melee as a warrior before they can spell you up cause, they have crap for hp.