Hello MMO-Champion!
I recently registered on this site just for asking this question, as we spent two consecutive nights wiping on Beth'tilac after 3 shotting Shannox, and while reading how everyone had an easy time with her it got me asking "Why can't we kill the damned bug?"
I know for a fact that our DPS isn't cutting it, basically due to having too many ramp-up classes (Fire Mage, Enhancement sham, Affli lock). We've tried switching the mages specc but then the AoE falls short. Anyhow, the times we do make it to P2, with only the Enhancement shaman up top, we die to the Frenzy. People seem to suggest to pop heroism at about 40 % hp which is what we're saving it for, and dying around the same amount, at this time we have between 25-35 stacks of Frenzy, and the AoE starts dealing 50-60k damage, DPS is obviously hanging low but are our healers too weak and should they be able to handle 40-50 stacks with hero up toward the end?
Thank you for any advice given.