If you haven't heard, Ravencoin has switched mining algorithms to Kawpow which is a modified version of ProgPow. It's asic resistant and the algo switch has booted off a bunch of ASIC miners. The profitiablity is very high currently, so if you've got a GPU you might want to mine some RVN while the getting's good. I don't expect the profitability to stay for long as this is by far the most money to be made in mining for a while. Not financial advice.