Just an FYI here:

I've tried MB'ing a Riftstalker tank and he was really difficult to keep up on my team. Granted, I am running 4 clerics in addition to a "tank" but the Warrior (Reaver/Paladin/Warlord) was far easier to heal.

Has anyone had success tanking with a rogue in a box group in instances? The rogue was fine questing and tanking rifts, but in dungeons, he got his butt handed to him time and again.

More info:

He seemed to tank IT pretty well although he had already outleveled the instance (at 19). Tried DSM at 26 and that was when he had trouble.