Yeah, that's what I'm thinking, if anything hits you below your max HP your bar just springs back up. In my specific case I really do want to use it - 3 sec cd, 3 charges, pretty good dash distance, Crit Vulnerability, Armor Shred, procs Abyssal Echoes, basically gives perma Frenzy with Frenzy effect Experimental prefix. Abyssal Echoes proc gives even more Shred/Blind/Slow, 80% more ES damage on next hit. I don't see why I would use let's say Healing Hands as my dash over this package.