The Horrible Effect of Parry

[Mavfin]

Back in the original BWL days, Horde guilds trying Broodlord were having issues with the deaggro and had to maximize their threat generated. One way they did this was by handing off the Sunder Armor duties to a DPS warrior, which allowed the tanks to focus on attacks that had higher threat per rage.

Yeah, Sunder isn't a high priority for the main tank to get up quickly, so sometimes people will help finish the 5-stack for maximum melee DPS. The main tank is more concerned with high-threat moves, and keeping shield block up. The tank can hold aggro better if another warrior finishes the sunder stack, and they can do even more TPS if someone keeps imp thunderclap and imp demo shout up, too.

As far as the threat issue of sundering by someone other than the maintank, it shouldn't be a problem, as revenge/shield slam > sunder by a large margin, especially with the threat modifiers on def stance vs battle/zerk.