Originally Posted by
Ielenia
That's the problem.
5-masks Rexxar is not a "nuke test".
In fact, what you should actually do is to DPS him slowly until he reaches 50% health. Why? Because he summons his boars at fixed intervals of his HP, up 50%, which is when all boars are out and he summons the fleshbeats rampage.
DPS him slowly, focus the boars as they spawn, then nuke Rexxar once all four boars are dead. You should only ignore the boars and focus and nuke Rexxar outright if you get a Gift of the Titans proc from killing the first, maybe the second boar.