So if you are put into a nightfall or raid the vanquisher will out preform the necrochasm? I wasn't using impact and damage interchangeably I know that the impact is the same on both the nope and the nechrochasm but impact is not nessecarily that important unless it's super high on a sniper or fusion rifle. The exotic primary is the smartest move by far because most armor encourages exotic primary synergy. the primary slot is called "primary" for a reason, because you are supposed to use it the most.