There are a lot cryptonight miners around that a much better than Claymore's. So if he doesn't want to continue development - leave 0% fee and exit is a right move!
Name it.
xmr stak cast xmr sgminer-gm 5-5-5 SRBminer
Thanks for those recommendations. I'll give Cast and SgMiner a go to see how they do. I have a feeling Cast may suit me well.