I using multi pool for first time, so I dont know is this payment method is best option, or I should switch to some other coin?
You can use dash as payout, i did that. Or LTC. The price of it dropped big time with the china-ban so it could go up. Or you convert it to btc once a week @ shapeshift.
I had some temp issues at my mine so i manually set the fans to 100%. Since then i had no more hashrate-drops. The drops began randmonly when temps were > 71C°