My dps was dreadful on Jin'rohk, but it was because boss was tanked in the middle, and you don't get the benefit from the pools if they do it that way, until they are close to expiring. Horridon is just as melee unfriendly as it gets. If you ever tried empress heroic (where taking any melee was not recommended due to adds). You would have thought they would have learned, but they did the exact same thing with those poison adds, it's a bit of a joke now.