Nanominer has nearly 15% of stale shares on pool stats, gminer is better and it still works on 4gb r9 290 at full speed.
Hope PhoenixMiner can be fixed to work again on r9 390, i dont ask for 290, not so much time left for then on eth.
I like his fan control in linux and ethman statistics so wait for update!
You are right about the stale shares of nanominer. But for some reason gminer is not producing an accepted share for any of my 390's under smos. It may be related to opencl version 18.20 or it needs root access, I don't know. I can't test now under hiveos, where the opencl is 19.20. Any suggestions?