What makes it crucible gear? It is just gear. You do the bounties for the factions in PVE, they should take vanguard marks and crucible since they sponsor those events as well. The gear they sell is more useful in PVE than it is in PVP. I play both, but 34-50 matches per character per week to max marks is a little much. The 2 crucible vendors should be crucible marks only, but the factions should take either.