So I tried the 1.5% fee miner posted a couple pages back. On my 980TI (using exact same config), it was about 1.2% faster than SP mod #7.
What really shocked me was seeing the stratum difficulty actually change while mining on Suprnova. It started at 1, then went to 2, then 4 then 8. When it switched from "fee mining" to my personal mining the stratum difficulty reset to 1 but then never increased. I've tried creating new miners and I can't get the difficulty to go above 1. Whether I mine with the 980 at 3.2GH or pair with a 750TI for a total close to 3.9GH the difficulty never changes. Anyone have any suggestions on how to fix my stuck stratum difficulty?