A living dead rework suggestion

[Undeadfire]

Technically, FFXI (still ongoing) has DRK being able to drain stats and HP from their opponents. They incorporated that somewhat with Souleater, they probably should be giving a self-cure potency with the Blood Gauge skills to incorporate it further (since you know, you're using BLOOD to pay for this).

And other FF games, Dark Knight uses Darkness abilities which sacrifices HP for more damage. The lifesteal effect is Absorption magics. It's either a Tank class, or a melee DPS class.

Sacrificing HP wouldn't work in this game, nor for a tank.