I think both painwheel need a litle buff.
Blood Drive:
Signature Ability 1
10% chance (instead of 5) on HIT to inflict BLEED on self and on opponent for 5/7/10 seconds (inflict a normal bleed for both figthers)
Signature Ability 2
Gain 3/4/5 stacks of permanent ENRAGE when having 5 stacks of...