This is a 41212 Narrow Diamond tactic I have created.

All results were from Holiday tests.

Fast strikers with good dribbling stats seemed to have performed better. As you can see from the screenshots Lookman had an insane season for Fulham scoring 37 in 38 league games.

Chelsea result was a small amount down to luck as they didn't get too many injuries, my advice would be to make sure you have good squad depth in midfield, particularly for the Mezzala's as the tactic drops off if you don't have good players for these positions.

Let me know how you get on!