Am I the only one thinking there's one caster class missing? Although Conjurer's can heal, it's tied to weapon skill (I'm assuming this means it eats TP) meaning they'd have to attack the target aswell, and in the interview they don't really paint the picture of Conjurers being (main?)healers all that well.
I can't really see them being healers unless regular spells generate a decent amount of TP and the cost of healing through TP is quite low.