A good attack plan fits on an index card and matches your pitcher's real strengths to the opponent's real habits.
Start with your own pitcher
Which pitch does your pitcher command best? Pitch chart data on strikes, location and catcher-target hits tells you what he can throw when he has to.
Scout the hitters
Look at where each opponent's hits came from and which counts they swing in. Spray charts and at-bat pitch sequences show where they do damage.
Write zones to exploit and avoid
For each key hitter, list the zones to attack and the ones to stay away from. Keep it to a few lines a catcher can remember.
Plan by count
Decide what to throw 0-0, when ahead, and when behind. Getting ahead with your best-command pitch and expanding the zone later is a common shape.
Let AI do the first draft
In ScoutBall AI, pair your pitcher with a scouted opponent and the AI attack plan lists pitches to build around, zones to avoid, and what to throw in every count. Review it with your catcher before the game.
Update the plan after each game using your new pitch chart data.