I've built ASM kernels for Baffin (RX460/560) cards with good speedup for DCR/SIA/PASC and may be 1% for ETH, now I check what I can do for Nvidia cards. New version will be available in 2-4 days.
Impatiently waiting for this

I'm curious, would optimizations help your zcash miner too,
I find it strange that old 7850 1GB Radeons have 50% better
performance than RX560s with 4GB memory