Seems like I am too late for this bounty. Hope my branch of sgminer still helps.
It's an optimized sgminer for mining Xaya on AMD GPU. It's about 35% faster than nsgminer.
RX 580 at 650khs, Vega 56 at 1360khs.
Check: https://github.com/fancyIX/sgminer-phi2-branch/releases/tag/0.7.2-1
Usage: -k neoscrypt-xaya -o stratum+tcp://eu.bsod.pw:2534 -u YOUR_WALLET -p x -s 1 -w 256 -I 17
Note: this is not a malware...