What's the first step in their mind? Is it 'what's the style of play that works in modern football?' or something ling 'among my offensive players, who is both physically in form and also in form in terms of good performances at the same time, just start the top 3'For example for France at the World Cup I would think 'Ok who's doesn't have injuries, major or minor, and has been having the best consistent performances lately, offensively? mbobo dombele katikake? Ok I'm gonna start them in their favorite position'Then the rest follows in terms of tactics, step 2, 3, etc.
What's the most successfu formation and style in football? Find the best such system that works with the available players. Rank-order the most important position. Rank-order the best players. Don't forget to insert some experience and an aura player.