Chromatic fire has been sub par for so long and I definitely feel like it needed a buff especially since firefly is back in the game.
Imo The buff that bombardiers got would be great on chromatic fire as it would give the explosions a unique aspect and give us a reason to use the chest piece.
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Tbh I'd rather have an exotic that gave us bombardier's effects on our rifts. That would give us better defensive options, each effect being tied to it's relevant subclass