It's about the right tactic, if you have a Team which can switch easily to an counter Tactic and is able to play it right... There is no Position which I could say is the best, one of my ST is on of the best Assists in the League and even he made a lot of Goals, the other one make more Goals but is dropping in Assists behind the other one. One of my AML/AMC/AMR make a lot of Goals, most from an Assisting other Player. So I would say: Team-Play over all! All Positions are needed, and all have to do a pretty good job, we are looking more on Assists and Goals, but how often did a defender kept your ass? How often did the Goalkeeper catched the corner ball or the free strike to save the 0?