Why don't the cost reductions associated with stage 4 Vampirism and the Vampire Lord's set do anything to offset the cost of Simmering Frenzy? It seems like such a small amount of a damage increase to begin with (400 at most) while annihilating your health.
Vampirism in general is already weak, so why can't cost reductions apply to the increasing health cost of this skill? Vampire Lord's set is also already underpowered as it stands, as well. I suppose I don't understand why such an insanely overpowered class like the Arcanist is fine, but a few increases to vampirism utility is such a big issue.