You dont have to trouble yourself with such things as far as you win. There is not a formation that provides many goals. Even if you play with many strikers and ams it's not certain that you will score more goals. I normally play classic 4-4-2 but this season i have scored much more goals by playing 4-5-1 (dmc-ml-mr-mc-mc) which is much more defensive that 4-4-2. What i mean is that there is not a scoring formation but it has to do with the players quality, the other player's formation and pure luck.