Well, if you want help too, vitality is for overpower is not max health, max health is for fortify if you can handle, and dex for crit chance, so you need too. Is not full Int. Also they erased the option to have more vitality or dex so you have to relief on paragon and pray to god, maybe eat a raw lamb with bones too.
Is needed at least 30% crit chance, and since i use overpower blood build, crap, cause they didn´t fix for necros, because of barb. The worst part is not crit chance, that you can have it, the worst is overpower that because barb was too much tunned, they nerfed overpower so we got destroyed. So blood builds sucks.