what is the best pool to mine raven?

i already have 26Mh on Kawpow and i was mining on nicehash. and gave me around 2.5$ per day (not estimated value)

and today i switched to flypool because people told me that direct mining is more profitable. it shows me estimated earnings around 1.85$. not nearly high as nicehash gave me. and also whattomine.com shows around $2.82 per day for 26Mh.

why am i getting low estimated value on flypool?. can you recommend another good pool to me ?