Originally Posted by
Shurrikhan
The mere fact that tanks' rotations are something unalterable, i.e. to be merely "maintained", indicates that there may well more complexity in the healers' offensive actions than the tanks'. Apart from DRK (via TBN DA banking for raid buffs), I can't think of a single tank that has to consider damage taken or party actions in any way that would change its behavior.
And let's remember how much "buffier" they are. They mitigate just over half of all damage dealt to them when you take the multiplicative effects of Defense, Trait, and their defensive skills. (Defense and Trait alone compound to around 46% mitigation, while defensive skills tend to be used where the most damage is inflicted, thus skewing the contribution of their heightened % mitigation to an even effect overall.) They remove the need for more healing than they could actually ever even receive from a healer.