Coinmine the best. Using it with HIGH DIFF port you can get more stable genoil miner than with suprnova pool.
I'm going to stick with MPH as long as it stays stable. I like their auto-exchange feature. With coinsforall I'd have to wait for .005 ZEC, and then wait an hour for the xfer to be confirmed on Polo before I could sell. I want to dump my ZEC as fast as I can since the price will be going back below par with BTC.