If you can grind out a few more levels in oasis (did on my rog til 22, so you can on whatever
[You must be logged in to view images. Log in or Register.]), then head to East Karana. Kill spiders at the bottom of the ramp to high pass. They die easy, drop decent coin and a ton of silk. Was able to do those pretty steady until upper 20s and made some decent money doing so.