Blood Magic

Can someone tell me why should I use Bloodmagic instead of mana? Since I like using auras on my marauder, I'm currently 31 lvl with about 910hp and when I use the vitality aura its taking away like 350hp which is a lot. So when u use Blood magic u shouldn't use auras?

You use auras that reserve a fixed amount of hp. when you have like 3k+ life, the 300 reserved is nothing to worry about.





edit: sometime people stack life and reserve those high cost aura on purpose to achieve "low life"

Also if you use blood magic gems isntead of the skill you can reserve 100% of your mana while useing blood magic on your active skills.