I have tried Nicehash with my S9's for 24 hours and the payout was considerably lower then the pool I use. Just my 2 cents. I have not tried any other mining machines on the site....
Hash power you rent to work with the miner higher like you used will be better option to get the more profit. If you have miner and making with decent hash power means you would not able to get the better amount every month. Check some video tutorial speaks this in YouTube it can be helpful to you make path clear.