If you do not have a strong heart it is best to skip this tactic. It is not for you .
My football philosophy is simple the best defense is attack. I love attacking football and I always in FM play with attacking tactic and my favorite is 433. It is risk and always on the verge on fouls and possibly red card, but I love it. I cannot guarantee you that you will win titles or end the season without losing, but I can guarantee you that you will play entertaining football.
I always split pitch on two sides Left and Right. Players on the Left side (in this case DCL, WBL, MCL and AFL) their stronger leg must be left and for the other side (DCR, WBR, MCR and AFR) their stronger leg must be right. Also, players on the left and right must play the same role position. You must be wondering why? Because I love symmetry and hate asymmetry...simply . The other three central players in tactics (GK, MC and F9) can be left or right or different role position.
GK - defend
I prefer my goalkeeper to play simply. The less contact he has with the ball, the better for him. I don't like SK and my goalkeeper is always GK defend.
Example: Oliver Kahn (in my opinion the best GK that has played this game).
CD - defend
Tall, strong and powerful. Simple pass to the nearest player and not think too much.
Example: Nemanja Vidic or Tony Adams
WB - attack
One of the most important positions on the team. They must be good in defend and attack position and always play along the line.
Example: Andrew Robertson or Trent Alexander-Arnold
DLP - defend
Link between defense and midfielders and also very important player in this system.
Example: Fernandinho or Sergio Busquets
BBM - support
My favorite position on the team and my midfielders are always playing as BBM. They run up and down constantly.
Example: Roy Keane or N'Golo Kanté
F9 - support
Little danger behind the two main strikers. It's not classic ST and it's not AMC either, it's something in between.
Example: Roberto Firmino
AF - attack
Attacker who is like a tank and destroys everything in front of him. He has a license to kill.
Example: Thierry Henry or Ruud van Nistelrooy
This is the end...
You can see my results with this tactic on my career here https://community.sigames.com/topic/504842-fm-20-escape-from-balkan/ but be careful, I warned you...