Well i have just came across this thread and would just like to make the point that "taunt" is limited, a tank can no longer keep large groups taunted even with both aura and taunt, if u have a group of 20 foes and u taunt another group the group u had will run off because 20 is the max a tank can keep taunted...now i have 2 lvl50 tanks, one with taunt and one without and tbh they both taunt the same and both hold the herds the same. Personally i thing its the way some people slot there auras, i always slot 2x acc,1x dam, and 3x taunt which works very well