I tried mining with mkxminer v.2 on stratum+tls://mona.suprnova.cc: 3001. Miner goes perfectly is very powerful. Compared to sgminer, this is an incomparably more powerful program.
On my mining rig, the RX480 achieves such results:
https://imgur.com/PDMkr2tOn the first page are approximate GPU card performance. I only reach 26 Mh/s.
How to get the RX 480: 36MHs ? I have four msi RX480 8GB (1303/2000 Mhz) and no overclocked GPU cards.
Are you using the "best' batch file that comes with the miner? That should give you 33-34 mh/s at stock settings based on the testing I've done on a Rx 480 8 gb.