Found that GCFO worked better for me than CBVs. It spreads out enough to get the wolves, and Gravetender will stand in the lava. Once the big wolf comes, he basically just stands there. Hit the wolf a couple of times in the face with GCFOs, then used Toxic Mist and ran around the pillar. Once he went red eye, I switched up to my shield and rolled around the pillar. Next thing I knew he was dead from the poison.