Originally Posted by
Supersun
The point of Stoneskin isn't because it's needed to help keep the tank alive. The point is to buy the healer a few additional seconds of time before they have to cancel clerics stance and start healing. From the perspective of a Scholar that Stoneskin can be the difference between the full Bio II, Miasma, Bio, Bane on a big pull or having to cancel early because the tank is getting wrecked by the big pull (and Gubal Hard definitely has a few large pulls where this can happen)
Either way, unless you are running out of MP (...seriously?) there's no reason the healer shouldn't be casting Stoneskin at the end of the pull while the tank runs ahead and then the healer uses Sprint to catch up. Like there's virtually no reason not to do it.