We usually go in with 2 rogues at the first dazzling destruction to stay there the entire fight, and a holy paladin + mage going in once in a while if necessary.
To survive as rogue I usually use prismatic elixir as the adds will go down quick anyway, I also use feint as often as possible and always reset my stacks with Cloak of Shadows at around 25 stacks, make sure you don't hit any orbs and you should be fine also make sure you keep an eye on the flame breath from the theralion > valiona transition as that might kill you inside, same goes for dazzling while you are inside.
Any other questions let me know.