Pally tanking the OS adds is HELL. We have, really, two aoe attacks. One of them is on an 8 second cooldown, the other is only usable in absolute melee range. The 8 second cooldown, Consecration, has another disadvantage in that once used, it's in the same place for 8 seconds, doing very minor damage every tick, which adds up by the end of consecrate. The problem is, the adds are EVERYWHERE in Sarth (specifically the elementals). We can maybe use our single taunt on one, and our 3 man taunt on another, but it's possible that if we use our 3 man taunt on a fireball, we could taunt Sarth (don't ask, just know the mechanics are retarded).
9/10 times, my guild uses a Warrior tank for adds in that particular fight because of their versatility (Taunts on cooldown? TC and SW on cooldown? Fine, they just pull a juggernaut on an ele and charge it, then intervene a healer to get back to the center. WTF.) Warriors always have been, and still are, the most -versatile- tanks in WoW. Someday I'll have mine levelled thanks to this subforum's help ;_;