These are the notes I took while doing it:
So basically the issues are with mobs going beneath the floor, once they do that you can't melee or cast any DD spells on them. They do still take damage shield damage. I was able to kill them by casting my AoE rain on myself and timing it so it killed them before they went into run mode.Avatar of Wind temple, phoenix djinn elemental mobs falling through floor.
Avatar of Smoke temple, temple guardians falling through floor.
Avatar of Mist temple, temple guardians falling through floor. Avatar of Mist summons. 1500 unresistable DD proc can one shot you.
Avatar of Dust temple, temple guardians falling through floor.
Also Avatar of Mist, he summons so you have to tank him. He can chain proc his 1500 unresistable DD and kill you in 3 seconds if you're not ready for it.