Something my group has found useful is on the "damage phase" or beginning of the fight where the boss is just auto attacking, and throwing an occasional cone attack out, if you full 6 man stack right inside the boss's yellow ring, no-one will be hit by the cones, and then because you're all so close, he teleports right next to you, meaning nobody loses damage and you can walk like 2 feet and be back inside the ring and not take damage, then block the stun and prep to move out before the scythes
I noticed that when the boss does the unblockable floor slam AOE, you move forward to dodge it. did you mentioned that as well in this guide? I just noticed it.
