When I attempt Stormwall Blockade mythic on my UH DK (w/pet) I burst down the casters on the boat but the boss stays in the center anyway and completes the raid wipe cast.
I just did this on my 476 Fury Warrior and completed it no issue. I went in thinking there was no way but I did it. So is the DK pet bugging the encounter?
Edit: Went in as Frost. Pet definitely mucks it up.
Edit 2: Tried UH without pet and it seems like having anything else out like the mobs from Apocalypse messes up the fight. Plus without the pet the dps just isn’t there to kill the casters fast enough, which is weird. Sad. 