In Lavastorm once you have completed enough faction for the Sootfoot Goblins to get a mount and have activated all the portals in Lavastorm, there are 3 quest that are really easy for 65+ to grind and make up to 60G every 10 mins.

Like Pulling Teeth - Magnurmal (HUT NEAR THE BRIDGE -553,118,456)
Drake Die-Kaput Time - Smapy (JUST BEFORE GOBLET OF RO -649, -66, -123)
Colossal Smash and Grab- Kipukas (JUST BEFORE GOBLET OF RO - 649, -66, -123)

All these mobs are relatively close together...
Collect the Q's and head to Solesk Eye Via the Portal in Shrine of Thunder,
Run down through Dragons Breath Tunnell. Kill Drakes
Then head towards Solesk Valley and Kill Golems on the way.
Then Make u way to Solesk Valley and kill drakes again.
Catch Portal to Solesk Ro Temple run mount at end of path heading to the lava fields and catch it to goblet of ro hand in q's get them again, then use mount to head to najenas valley, jump of at the hut near the bridge and hand it get again, run to shrine of thunder and back to solesk eye!
Rince and repeat
takes me about 10mins per run! and BAM 60G