For the moment we dont have any way to mitigate this damage.
Utamo tempo doesnt work.
Mana Shield doesnt work
Energi Ring doesnt work
Our team feels like agony its a mechanic u have to heal and pay a lot of atention on mechanincs in everyboss for dont get extra agony damage, cause as u said, u cant mitigate it!
I hope i helped u,
greetings Gleemody