Wouldn't mind if DRK got some more HP related abilities to tie it with older designs.

New trait: Gain blood gauge when loosing HP in combat, 1k hp = 1 point on guage

New ability: Dread Spikes, similar to WAR vengeance, but instead of the dmg reduction, the DRK is healed for the damage amount dealt to enemies

New trait for blood weapon: When out of tank stance, blood weapon will now drain 5% of the DRK's HP per WS and convert it into extra damage. This 5% HP lose will trigger the first trait, giving more blood guage.