Leveling from 85-90 as a tank in Mists of Pandaria

With the change to Vengeance in Mists of Pandaria, a tank's solo damage has just about cratered compared to previous expansions. Gone is the heyday of Wrath when we could kill things on our own, one on one, without our six o'clock shadows coming in. Here again are the unhappy days of The Burning Crusade, where there was plenty of time for a bathroom break between the engagement of an enemy and its much-subsequent demise.