Wait! New idea! Ok ok... we fight on the backs of dragons... but not in a really lame way like in the Eye of Eternity... instead, it's like that one really epic quest in the Storm Peaks where you jump from dragon to dragon and fight against the other vrykul on the backs of the dragons.
Think of that... but instead, all the raiders are on the backs of red dragons. The healers and ranged DPS attack from the dragons themselves and fight Deathwing, while the melee DPS all jump on his back and attack him from there.