Please don't post the flames "OMG THIS fight is so easy, you don't need this, blah blah blah". Yes, I know this exploit isn't required for the fight. However, it's useful for those who just can't quite get it.
You can use the Direbrew's Remote - Item - World of Warcraft to port someone out of the instance with the mark. You can't hearth or anything because if YOU have the mark, you can't cast anything like that because you get interrupted by the damage from the mark. However, someone ELSE can use this to open a portal for you to take. When you zone out, the mark is gone, and he did not heal. Summon back for loots, GG.