The daily challenge today for killing 50 elites gives out 1500 cR if you get this all the way to 48 or 49 then immediately once you get number 50 disconnect from live and reconnect an the challenge will reset to whatever it was so you can keep doing it I used this in conjunction with the ONI: Swordbase farming method and got it in 18 minutes see if you can do better. Also I only know for sure it works with this challenge and now because if bungie don't patch it it will be usable with any challenge but if they do then it's only good here and now.