This was my main tactic in the later half of the year playing FM20.
It's a downloaded tactic that was an improvement on an earlier 4-4-2 I used (with essentially lower wingers and an additional striker over a defensive midfielder).

All by all I used this tactic for the following saves and dominated:
- 3y KV Oostende / 3y Napoli / 3y Club Brugge save (5x Pro League, 2x Serie A, 3x Champions League (once with Club Brugge))
- KSV Zottegem from 7th Belgian Division to 1st Division with 7 consecutive promotions