Life Steal Crit Build?

I'm kinda looking to create a character who can leap into a group and just destroy everything. I'd imagine this type of build would need a lot of life steal and probably use Blood Magic. Probably need some resistances and definitely as much life as possible. I am kinda new to the Passive Skill Tree and don't really know it that well yet. I was hoping someone could point me in the right direction as to the path I should take with this build.

Thanks for the help!