Your 25.4 mh/s is very high for a simple GTX 1060 6 GB.
It is approx what I have with my GTX 1070...
Double check your settings. 1070 should be close to 30 even without severe overclocking. On my 970's I get 22-23 Mh/s and cards are cold (<60C).
I forgot to tell the power consumption of all my 1070s are limited to they minimum (100 W for 2 and 115 W for 2 others).
But even with these low consumptions (for GTX 1070), my ratio hashrate/consumption is under this example with 1060.
I can't use AfterBurner because I'm with Linux (but I can overclock a little bit inside the driver)