Guys, I had to bump this. I've been farming this way for 3-4 hours and got an orange invader sniper, the first orange I've got from a chest. Not only that, I've got 4 etech pistols, 1 etech rocket launcher, 1 etech ar, and 1 etech smg with a huge mag size. Good stuff. I wanna keep farming but will probably stop soon so I can continue with the mission, lol.