Paladin Solo Mythic Sikran - Nerub-ar Palace

This boss enrages at 6 minutes and 30 seconds, I barely killed him shortly after his enrage I'd most likely die to the tank buster while enraged without an immunity i just had to maximise dps and use spellwarding/bubble to prevent further applications of the stacking tank buster debuff.. i can comfortably take 3 stacks of it, but the 4th/5th (depending on absorb at the time) 1 would kill me, I rotate guardian/ardent defender if no absorb to ensure I don't get 1 shot from it