Originally Posted by
Windry
Warlocks and Ele Shaman do really well on this fight. Mages are a noticeable step lower on this fight, but they're still strong. If you want to see what class really does well on the fight, you can just look at the top overall rankings for each fight, or you can look at RaidBots.
As to your question of whether or not to stick 2 melee on Horridon the whole fight, that's really a decision that you should make on your own. The bottom line is you need X amount of DPS to kill the adds in a timely manner, and beyond that, you obviously want to get as much Boss DPS as possible. Your RL has to have a feel for: the gear, the personnel, and the consistency that your raid needs to reach that X amount of DPS on adds.
All ranged should also personally have a feel and awareness to realize when adds are dying quickly and Boss DPS is available, or when adds are dying slowly and they need to completely ignore the boss for the next few seconds to clean up adds.
TLDR;
Is it feasible? Yes
Should you do it? You have to decide for yourself.