There needs to be methods outside of the Raid to get 310 Leg Armor, Class Items, and Ghost Shells. Iron Banner would be good, but most appropriate would be Trials of Osiris, since that's the Raid tier for the Crucible. So yes. A Trials of Osiris themed Ghost Shell would be great. There could even already be one. There's a full set of Trials gear for each class missing from the Destiny Armory already.