Garalon 25 HC, what specc?

[a little Kappa]

I usually play demonology on all fights but I feel I'm not doing enough dmg to the legs here. Whats the best spec to go?

[Dastey]

2 other speccs to pick between and destruction sux. So 1 specc left, which do you think it is?

[Deleted]

I have no idea what your raids tactic is, but "damage on the legs" is not a priority: The damage is perfect if you just manage to kill one leg, when the next one spawns and that is usually easily achievable by just having melees on them. With that in mind, it becomes a very simple single target encounter in which Affliction or Demonology both work, with Affliction being slightly better.