Level 70 Protection Warrior Solo: Huntsman Altimor (Mythic difficulty)

Item level 458
The key is to get Bargast down ASAP before more than one set of Shades spawn.

[@DurendilLeHunt]

Was it the Sinseeker with +200% damage that stopped you from doing it last patch ?

[@TheCrankyTank]

Yeah, I basically needed better gear to survive all the damage and get Bargast down ASAP.