Literally tried PTR and im gonna be real normal clearing naxx cake not even breaking a sweat bosses had like 6-8 mil health(besides patch has WOTLK health) but on hard mode 4 they jumped from 6 mil to 25 mil which is pretty big but makes sense doubles health each hard mode jump thats fine but like the Abomination Wing hard mode mechanic 4 people are super charged attacking and casting faster but chain lightning so the mechanic is LITERALLY just those 4 go stand alone and if youre meele dps just afk til tis gone somewhere while the rest of dps just do there thing