blood magic

could someone explain to me the benefits of using Blood Magic?

You wont have mana problems. if you have enough hp regen it can be VERY awesome, downside is you can use high mana reserving auras

5-6 link ground slam use life on hit and life leech with dps supports to and never lose any health, alot less worry about mana is really nice and more of other flasks u can use besides health pot, armor flask, crit flask if you dont take RT

I think that I am going add blood magic late in the build. I will unlock the node before but wait till I have the correct gear and gems before I unlock it.

Around lvl 40 I personally think you can have enough hp regen / life to use BM. But then you don't have any really high dmg because you have to focus on the survival nodes. But a 4 link groundslam / heavy strike is fine dmg itself. - To a point