Blood dk's survivability is just insane. When I started leveling my Dk from 80 2 monthes ago (I took a 2 year break, just came back) I was getting my ass kicked in unholy, then I respecced blood and haven't looked back. I rarely have any issues with health, and if I do i can get it back with lichborne and death strike. Thats going to change as of today possibly, but I'll probably still pick up lichborne for the talent on that level.