This is purely my opinion, but it seems that you are being over-analytical about your game. You cant sit there with 89s and look it up on some chart to find out you should only play it against X number of players, in Y position, with Z loose and ¥ tight players behind you.

Despite what you may hear, there is no special formula to what you should and shouldnt raise, call, or fold. Accept for pot odds, and implied odds, but I see alot of people going to far with these, calculating it down +/- 1% Learn the concepts but dont fall into the trap of playing precise math poker, it will get boring and make you predictable.

My 2¢, for what their worth