4-4-2 and 4-5-1V are the best formations in the game for me. Start with 4-4-2ND and switch to 4-5-1V if I want to play defensive after scoring a couple of goals. I know that those formations are pretty standard but they don't have a real counter formation and they have carried me from lvl 1 to lvl 5 with 24wins-0loses-0draws in the last league I played.