This was done without Stance Dancing however. Logs are not showing how much damage Gur'thalak proc did for some reason.
Possible theorycrafting needs to be done on the use of Bladestorm glyph over Slam glyph on Yor'sahj. There were a few times were I was unable to Bladestorm as soon as the adds got stacked up, had to wait about 10 seconds or so.
Originally Posted by Arqentum
Please, post your Ultraxion logs with Gur'thalak asap.
From what I see right now - worse than I've expected.
(Ultraxion log will tell for sure)