As someone who plays almost exclusively BLM and BRD in CC I love the volcano map. LOS works both ways and doesn't favor melee any more than it does ranged. Its much easier to get away when there is a lot of cover around you. An open map is slightly easier on a ranged, but its also way easier to dive on a ranged player out in the open as well with little to no options for escape routes because....its an open area. C9 is straight trash for everyone. Its just slightly less trash if you're ranged and not getting dived on...which only happens in low ranks because people don't know how to focus fire.