[Kardiophylax]

My harbinger is in limbo in act 4 normal after suffering 1 death to some of the monsters using stun wave attacks there. In contrast, my sage made it to Epic Act 3 (survived all of Act 4 Normal) before dieing for the first time (to the stun/rocks of the Neanderthal boss). I'd say the harbinger would be a tough character to hardcore with, but if you don't mind a few deaths here and there, it should be a strong class (my damage output was good).