Kill 3 or more enemies with a single super use, 20 times. Kill 20 enemies without taking damage from them. You'll get more materials doing this way than dismantling them outright.
Swap them to your maxed main weapons and gear, turn over the bounties to unlock their perks, activate those perks using glimmer, then scrap them. Tip: Before turning in your bounties, equip any weapon and gear that can be leveled up - even if you're planning to scrap them later on.
