Farming Triple Kills.
I'm grinding the Blackcell camos and just have to finish the last one, which is 10 triple kills. I feel like it's as much luck as anything, since you have to have three enemies in proximity, and enough ammo to take them out without reloading. Currently I'm running Vigilance, Ghost, and Cold Blooded. Is there an optimal loadout and perks to accomplish this, or is it just going to be a weeks long grind?