Just my 2 cents, but if you want to upgrade all that weapons, why not make an new item sold from Xur that costs some Motes of light (so useless at the moment) that would upgrade any weapon to its next cap. Motes of light are experience tokens actualy, so they should be used to upgrade anything it would be logical. Exemple : Vision of confluence DLC 1 : 1 orb of darkness (15 Motes of light) DLC 2 : 1 orb of winter (30 Motes of light) DLC 3 : 1 orb of Whatever (45 Motes of light) The more you want to upgrade, the more it costs, so you'll choose carefully what to upgrade (this also should be done for armor IMO, so that you look different from any other player with the same level as yours). When you dismantle one upgraded item you get the last material used (orb in my exemple).