>>531576836
you need a lot of cryo application. Right now the best I used is a C0 Ayaka, but if you lack her you can use what you have. Diona, Rosaria with their bursts can help a lot. the problem is that you need constant cryo application while doing damage. That bastard goes high resistance with just a bit of time that is not cooled.
In the previous abyss, Hyperbloom with ayaka keeping it in the cold worked well.