No. You don't. You do what everybody else does and accidentally get them. No skill necessary. It's random. You do VoG... so does everyone else. You do Nightfalls... so does everyone else. You do Strikes... so does everyone else. You do Crucible... so does everyone else. RNG rewards are not earned. They are randomly given regardless of how well you played in that gave. Worst player in a Crucible match gets Ghorn. You telling me he earned it? No way. He accidentally, randomly got it for simply being there and playing poorly. Get it yet?