Song of flame definitely needs a buff. You don't gain any armor, the AoE is very small and a teammate can't even tell if you're in song of flame and usually just run past you. I think a few things are needed on SoF, first off, an extra animation of some sort to let your teammates know that you are actually trying to support them. This is a problem because most of the time song of flame is wasted trying to chase down your teammates. This is not by any means "OP" considering when a Titan defender activates WoD a teammate has protective dome around him when he goes to get whatever support perk the bubble gives. Second, there should be a timed perk upon leaving the AoE of the player with song of flame active, 5 seconds or so would be balanced. This way players would not have to be bunched up around the person using the super and can actually have a buff for a couple seconds.