Why is the share rates on this miner so shit compared to other miners?

I am mining ethash with 26x RX470 - Constant New Jobs from the pool but in terms of share rate, the SGminer will provide 0.09 to 0.10 share rate, claymore providing 0.06.

Pool hashrate climbs to 730Mhash (Miner hashrate 712) with SGMiner, Claymore Miner only pulls 400mhash, 530mhas maximum.

DEVFEE has something to do with it as well. Just when you are about to climb in share submissions, DEVFEE kicks in. He claims that you only lose 2-3% of earnings with DEVFEE, however I beg to differ. I claim that using this miner, along with DEVFEE loses much more than 2-3%. Sometimes the miner can go minutes without submitting a share.

I will grant this miner on ETH is more stable than SG. But what's the point? I would rather tune down SG and get the higher submission rates than use Claymore on full blast with lower submission rates and in turn lower earnings.

What am I doing wrong here? Surely something is up, because the multitude of Claymore users out there SURELY cannot be dealing with lower submissions and lower earnings.

It;s like you have to be a scientists to mine on PoW. Its either one miner does not do a good job or the other has settings that you need to be a guru to work out. Why can't we just have a straight forward miner, that works.