Tenacity. 500k plus hp. Most devo procs for 200-300k enough to kill a non tenacity sk which has around 250k hp. Life drain crest will heal his hp back up. 10/10 tenacity sk can take 180 3k hits. Non tenacity takes 90 3 k hits. Against 6 heros a tenacity sk takes 18000 damage with his buff up, lvl 3 ld crest can out heal that. With artifact can get around 700k hp.
Gotta love America.