Hey,
ZEL will have an upcoming algo change to ther unique algo, can you maybe reach out to them, offer your help and be the one who will provide the most optimized miner when they release their upgraded network?
Also n5 gives me a bit lower hashrate on 144,5 compared to n4.
Spending some development time on new ZelHash algo (new ZEL antiFPGA/ASIC algo) would be nice, as it's promising coin.