I am using a narrow 4-2-3-1 right now that is pretty successful. I use my AMC(r) as an attacking midfielder, this gives you more freedom to tweak and can have him shoot more often, with AMC (c) as advanced playmaker on support and AMC (l) as advanced playmaker on attack. Together with a DLF to start the game and team with "work ball in box" and "exploit center" I'm finding plenty of chances created. Depending on how the game goes I usually change my DLF midway through the game to Advanced fwd to try and push up and spread the play a little. I'm finding the 3 AMCs to combine really well, only problem is the "work the ball in the box" tends to prevent them from shooting when there is a clear shooting chance in the game. If don't select that however I find they will shoot from ridiculous positions and i usually get 10-15 blocked shots per game, which is frustrating.