Marrowgar moves pretty slowly, and stops to cast Bone Spikes often. Kiting him would probably work.
Can't test it this week, but I actually did that with an ele shaman back in 4.2.
Toravon is immune to my treants' taunts . Looks like 4/4 VoA is waiting until MoP.
Sarth 3D as a boomkin was fun though.