I was trying out some tactics by loading the same game over and over so I decided to try this one out.
Prior to using this tactics I had tried 5-10 games against the same team. Although I was favortie I lost about ½ of them.
When using this 3-3-1-2-1 my possession was about 45% in each game, although the bar in the bottom of the screen was around the middle all the time.
The good news about the tactics was that I didn't loose a single game. The bad news is that I didn't win a single one either

. I played 5 games and they all ended with a draw.