I would say the average is 2-3 offenses & defenses. I use the ND as my primary offense, but will switch to trips and shotgun at times, according to the situation. Being involved pretty heavily in the beta testing I can tell you that will change for some coaches. Right now a pretty small % of coaches use 1 offense and 1 defense, but that group will grow with 3.0. The reason is formation IQ will mean more, and practicing 1 formation will allow teams to grow at that 1 formation at a faster rate. IF you go that direction I would suggest trips or pro set. You can run or pass efficiantly out of either of these two formations. Good luck!