Now it's BTCchina and F2 pool.
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【Best Mining Pool Settings for Hashflare (updated daily)】
 https://docs.google.com/spreadsheets/d/15W5EuyMo7zO4SxysxmRUp3NT7nKoyyI99rZAeRBKbyY/edit?usp=sharing
 

Best Mining Pool Settings for Hashflare

https://hashflare100.blogspot.jp/search/label/Best%20Mining%20Pool%20Settings%20for%20Hashflare