One of my first teams when I started back in LK days was actually a Disc Priest leading 3 Hunters, one of each spec. I leveled up through dungeons without a dedicated tank and used 3 bears for tanking mobs. Priest targeted, hunters assisted and mowed everything down. Not sure how different it is now compared to then, but at least now you don't have to worry about their Happiness levels and actually feeding them. My only gripe then was not being able to use Volley with my setup, now you can use Multishot on mobs.