Well, Well done on getting the good result, even though you decided to approach the game in your own style, at the end of the day the decision is down to yourself on what tactics you play and all we can do is offer you advice whether you take it or not. To win 4-2 against a team 12 quality higher on average is a very fortunate result, although theres the possiblity of the other manager thats abandoned their team or they played in a illegal formation which would only help your team get the victory.