Normally we consider PP to be better than no pair hands, though it seems to me that in 6max AKo plays much better (postflop and preflop) than small PP 22-66. (Starting from 99 PP are obviously better.) At least in my database my winrate per hand for AKo is way higher than that for small PP. I raise PP and AK from any position PF and CB a lot of flops. I also used to call raises with small PP and mostly re-raise with AK.

I pretty happy with the way I play my AKo, I have a terrific win rate of 3BB/hand (I think it will get a bit worse, just a varience now), but it seems wrong to me that my small PP yield much less. So I am looking for suggestions and the ways to improve this.

Can you, guys, look in your Poker Tracker and check these stats? If you have some ideas concerning this point, I am very interested.

From my side I think that probably one of the leaks is calling raises with 22-66 (ecpecially OOP), as one will miss sets most of the time and will have to fold to CB. (There are some very good flops that one can float or raise like 556, but normally there are at least 2 overcards and it's a pain to call CB on a flop like KT6). Another problem is that once you hit your set it's not very likely that you can get a big pay off, in 6max people raise lots of hands and mostly miss the flops. (For example if you have 22, and OP raised OTB with JT you are unlikely to extract a lot on a KT2 flop.)
In FR call a raise -> hit-a-set strategy for small PP works better as OP will have a premium hand like AK, JJ+ much more often and will pay us when we hit our sets.

I'll get back to you in Jan when I have a much bigger sample size...25k isn't big enough for me.

Im at 20 / 9 and I thought I was the tightest 6 maxing SOB there was.