I might be necroing this thread, but the exact same thing happened to me while leveling Ume. I guess I have to blame myself, though, I didn't want to grind to 45 and tried Garuda anyway. The lack of defense (Aerial Blast instantly killed me if the rocks were less than perfect), and around 20% damage less from me (no Huton and no Suiton+Sneak Attack) were more than enough for us to die overwhelmed by plumes post-Aerial Blast.
