It seems you're asking about the "Diablo" tactic from Championship Manager 03/04 (CM 03/04), specifically looking for team instructions and how to apply that tactic in a 2021 context (likely meaning a modern replay, a modded database, or a retro tactic discussion from that year).
CM 03-04 Diablo Tactic - Football Manager General Discussion cm 03 04 diablo tactic team instructions 2021
In CM 03/04 tactics screen (Tactics → Team Instructions): It seems you're asking about the "Diablo" tactic
To maximize the effectiveness of the Diablo tactic, your team instructions should be set to a high-tempo, aggressive style: Mentality: (the highest level of attacking intensity). to keep possession and work the ball into dangerous areas. Focus Passing: Down Both Flanks to stretch the opposition defense. Closing Down: (high-pressure defending). Offside Trap: Counter-Attack: to exploit transitions. Key Player Instructions CM 03/04 Diablo tactic
The "Diablo" Midfielder (Middle MC): This is your most important player. They need high Pace, Acceleration, Dribbling, and Finishing. Players like Oscar (the legendary version from 03/04) are perfect because they arrive late in the box and score dozens of goals per season.
Supat Rungratsamee (Portsmouth) – Young, cheap, and wildly effective. 🛑 Is Using the Diablo Tactic Cheating?