Attack a cutback with coordinated runs. Stagger the runs to the near post, spot, and back post so one runner is always free, then finish the pull-back first time.
The winger drives to the byline and pulls the ball back while three runners attack the near post, the penalty spot, and the back post at staggered times. The cutback finds the free runner, who finishes first time. Emphasise the timing and spacing of the runs so one is always open. Vary which runner is free. Rotate the roles.
Three runners arriving together is one runner. They occupy the same few square yards, one defender covers all of them, and a pull-back that misses that spot by three yards finds nobody at all. Staggering the arrivals is what turns three attackers into three separate problems.
The zones are near post, penalty spot and back post, and they should be assigned rather than discovered. Without allocation, players default to the most attractive area, which is the six-yard box, and the box gets crowded while the edge stays empty. That is the same failure as defending the cutback, seen from the other side.
The near-post runner is often a decoy and should be told so. His job is to take a defender with him and to convert anything overhit in his direction. If he is judged only on goals scored, he stops making the run, and the space he was creating for the spot runner closes.
Timing differs by zone and this is the detail that gets missed. The near-post run goes early, because it is arriving at a ball delivered before the byline. The spot run arrives with the ball. The back-post runner holds longest, because the pull-back he is attacking has furthest to travel.
The finish is first time from all three positions, since the ball has pace and defenders are recovering.
One caution: this needs a genuine delivery to be worth running. Serving predictable cutbacks to the same spot every repetition trains the runs but not the reading, and the reading is what makes them work.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.