Which hero do you like?

Yeah, right!!!! And what about the fact that they'll be getting beaten up – does that not count? There's enough mana, don't worry:) By the way, the Ice Bolt spell and the Magic Fist ability don't protect against arrows for Djinns and Mages, and Vampires don't have any protection at all.

Although, Death is very effective against Life, I won't argue. To defeat Death, Life needs to sacrifice normal development – that is, build Crusaders instead of Monks; and it's also preferable to make the hero a Paladin, although that class is quite weak.