Go to patrol Venus and go to where the loot cave is (where you have to stand on something and jump up for them to spawn) look up a video go to earth and go near the entrance of the Kings watch, 3-4 vandals spawn there, kill the knights on the other side and the vandals will spawn again (sometimes dregs and a servitor spawn) Go to earth to the place where you first come out where you first started destiny, there's a ship that drops 1 vandal, kill all 4 vandals that drop and wait for the next ship