Kuba pool of RR/debuff cannot be mitigated in terms of damage reductions. In fact i’m pretty sure the pools mess up your dmg even after he is dead, as i’ve seen in wave 154 fighting Visage.
I’d add that at wave 159 it’s a good thing to trick sentinel into using his acid breath and not get hit by it. I reduces your dmg substantially and affects the rest of the wave sometimes. The idea is not to let Ekket conjure fissures.
For for example Sentinel starts breath animation, you SS to him avoinding his breath, hill him and move straight to ekket.
Then kill skelletal dude’s second form if he’s there so it won’t transfer into 160.
Wave 159. Attack Theodin first. Kill fisrst for then attack the Abominations that rush you. When Theodin 2nd form is up damage it. Anasteria will have arrived by now so keep damaging abominations and theodin while retreating.
If Anasteria is last to kill, usually the case, make sure she didn’t stack too much RR before she dies (it ca be up to 60 or 70 for 5 seconds so beware of this) so you can safely rush lower left Nemesis at 170. She applies RR with her projectile lob attack