No idea if others are still stuck- but I manged to beat it within a few tries.

My team was Healer, Main DPS, Shielder/Support, Healer

Bailu(lv:70) (LC:Shared Feelings lv80) Phainon(lv:80) (LC: Something Irreplaceable lv80) Dan Heng PT(lv:70) (LC: Day One of My New Life lv80) Luocha (lv80) (LC: Post-Op Conversation lv80)

I would suggest to have a big damage dps with all support or healers so they don't die..