I have tried fighting him and SB using HOTA and Rend (along with Sprint, WOTB, BR and Frenzy). I have been going after Kulle first, survivability is not the issue, doing consistent DPS to Kulle is -- I get in a couple of hits then have to chase him down or move out of a bubble. This makes WOTB impossible to keep up. Is there a better way to do this? Can Kulle be pinned in a corner (without me getting savaged by SB)? Should I focus on SB and take swings on Kulle only when he comes near? I would greatly appreciate whatever advice people can give on maximizing damage output in this fight or otherwise how to deal with it.