There's an oskill that may roll on amazon helms/shields called exactly Blood Fury. It fits like a glove the theme of Bloodzon (drains life + buffs spell damage). One odd thing is that after using skill the additional effects of skills (given by Bacchanalia) won't trigger. I think it should as that would allow the player to have 3 possible ways to trigger Bacchanalia's buffs to skills. Especially that the name is exactly the same and the activation cost is fine (50% of Life drained over 30 seconds).
I can confirm it, also one more thing - spells have energy synergy, therefore as a blood zon you want some vit, some ene and dex/str or items. Thats alot of things, for most of chars /builds only one attribute is a must, for bloodzon 2: vita+ene. For "blood spells" - i e spells cast by "blood"- i'd give vita synery too. And maybe reduce ene synergy. Honestly, nobody wants to play bloodzon w/o blood fury.
Bloodzon may be worth of its own discussion, its a complicated build from the start.