Cover 3 Training - Madden 15

I having trouble getting gold on this in all-pro. I've tried DEN offense against JAC and CLE defense.

The Cover 3 training won't let you pick your plays between the few they give you. They give you a set play at the line of scrimmage even if your needed more yardage for the first down.

My question: What's the best offense and worst defense in Madden 15? Where can I find this info? I see only ratings on individual players and overall team.