This is a Tactic that I've been working on, and this works pretty fine, This is based on Pep Guardiola's style of play.
I am Winning the league, just one defeat that was against BORUSSIA DORTMUND as I was playing with my B Team. Also, on the verge of winning DFB Pokal and UEFA EL.
Actually I worked on this tactic on FM19 PC version, where I played FANTASY DRAFT with my friends, and tried to bring the closest possible version for mobile.
For this Tactic to work the best, you need, Creative players.
Striker : Either Poacher/ Complete Forward
Wing players : Inside Forwards
Midfielders : 2 Advance playmakers (Compulsory) and One Defensive Midfielder/ Deep Lying DM
DL/DR :Full Backs, work the best, but if you want to be more attacking you can go for WB.
and central defenders need to be, BALL PLAYING DEFENDERS.
Goalie: can be SWEEPER KEEPER/ GOALKEEPER.
Hope you like the tactic, try and let me know in the comments section below.