I've run this dungeon quite a few times and when I ran it tonight with my FC, all was going well. Until the final boss.
Adds were burned down well, lb on the last add, then all crud breaks loose. Now I can deal with beguiling mists, it's fine. But we encountered an attack we hadn't seen before, "Fatal Allure." If you're unsure about the attack, she one shots a party member and uses their hp in a "Blood Rain" attack. It wiped us multiple times. I wouldn't call it an issue with not downing her fast enough. She casts it very early in the last phase with 25% health left.
I've found some different things on this attack, but nothing too helpful. Can anyone offer advice on this attack?