I've spent the last 5 or 6 hours doing 1570 and 1540 nightfalls for even a single mindbenders and not a single one has dropped and it's incredibly depressing and down putting. And before anyone says "did you kill all champs" yes always and always even the last few that spawn at the end of the bosses health bar. This RNG is -blam!-. The fact I've gotten the so called "rare" exotic drop more times than a single mindbenders is not okay. Seriously this is beyond depressing.