This works best with a prot pally, i have a lvl 64 full prot specced pally.
Go to RFD and you can skip as much mobs as you like.
1) go into RFD and make a right turn when you walk into the instance.
2) kill glutton, then go to the last boss, and if you see the rare guy kill him.
3) then go to the skeleton boss. after him its fastest just to run out of the instance and reset after you d/e the items.
4) sell your small radiant shards on AH a little less than what the lowest is ( around 10g on my server)
The fastest iv done a run in RFD is 11 minutes.
So i bet you lvl 70s can run it even faster. my new best way to make money
heres where RFD is ( for d0tc0m)
im getting fraps soon so i can vid it showing how i do it. gl and happy farming
and here is a picture of RFD