Yeh the blood cost seems way to high for such minimal damage atm. Maybe a pure dps end game build it may be applicable, but atm it is almost pointless.
I am currently using assault aspect with DoT/hellion build. Working great
Pulling 4-5mobs at a time and healing up pretty well (heals arnt OP like they used to be haha)
But I don't have to really stop at all in between pulls, healing while moving rubie is a luxury
May try and switch to support build in a few more levels
Thanks