I am the OT on this fight for our guild. My job is pick up the Pummelers when they spawn and hold them....all of them.
Until then, my role is Sunder, Demo, TClap, not get melee killed with debuffs, and be prepared to move to MT if the MT dies, DC's, etc. What I also do is Shattering Throw the boss in the initial seconds once the MT has aggro and boss is positioned, go Def Stance, Charge and Devastate until 5x Sunders are up.
"In other news, Sarth 3D makes me want to stab kittens." - Horacio