Below lvl 10, it depends on your players, above this would be tactic set up and arrow uses. 11 unbeaten game is not so Excellent, just good only, ok? I hv used 3-1-4-2 to win 3 unbeaten leagues (26-0-0) but i have adapted another way of approaches since it s getting tougher in higher level as many players are active with legal formation, smart set up. Unless, you have full scout with 8 stars player, formation doesnt matter any more. I dont buy token, and i choose smart tactic set up. 3-2-2-1 butterflies got raped against many formations like those with 3 wide defs, or 4 defs and focus passing middle. Remember, formation against formation, none is best, just a game btwn managers, and the smarter win the game!