I put here a list of high-regen mobs (after Oleg's list).It's not complete, but i think it's good enough for a noob.If you consider it's more to add, feel free to post.
Allophyl
Ambulimax
Araneatrox
Atrox
Aurli
Caudatergus
Combibo
Estophyl
Eviscerator
Feffoid
Frescoquda
Furor...