So out guild have been having troubles on this boss weekly, and i'm hoping to figure out what we're doing so desperately wrong.
We can kill her, have a few times, but usually we only get a kill running GRGRGR, or GRGRBR, while using 4 healers, and even then, it seems to be down to luck, depending on how many healers have to deal with dropping cinders away from the raid, and kiting the torrent of ice. In general, we sink an annoying amount of time into this boss each week, and i'd love to figure out a more reliable way of getting past her.
When running 3 healers, we get overwhelmed by raid dmg just as easily, again depending on how many healers are being forced to run.
We've also tried including another blue head in the rota, but we find it doesn't help a huge amount with general raid damage, and again just causes more issues with cluttering the few areas in which healers can keep the majority of the group in range, as well as adding more "run away, little girl" mechanics for the healers to deal with.
Rampages don't kill us, not a problem. Tank damage isn't an issue either, even when we're trying GRGRGR, it's usually just general raid dmg + RNG between killing heads 5-7.
Generally it's just tough raid damage causing an issue (apart the occasional frustrating wipe due to healers standing in acid bombs) and as soon as 2-3 healers get cinders/torrent at the same time, we're done.