While I understand that destro, or warlock for that matter, would be more useful on the floor, I am one of the better able members of my raid group that can handle the belts. I have read all the posts talking about how this is a dumb strat but at the end of the day if it is what gets us the boss kill I really don't care how dumb it is. That being said, for anyone else having difficulty with their group and having the belts done on a regular basis, glyph Eye of Kilrogg, use your eye to go around the rim of the pipe and jump over to the platform. Stay in your eye (about 30 seconds left on it) and have tank to pull timer, once boss is pulled drop your teleport and you can avoid getting the debuff every time.
And for the record we've tried hunters (plural) a monk and then various teams and have been at this boss off and on with people taking breaks since April. Just got back at it last week and the belts seem to be the bane of our raid.