Depends. When I use:
3N-2W-3N-2 (5-3-2), I had almost everyone in blue arrow, including one of the strikers. Sometimes just one striker in red and everyone in the middle and at the back were in blue. Use rationality. Seriously.
4-1-2-1-2 (narrow diamond) or 4-3N-1-2, 4 of the midfielders were in blue arrow, and both strikers were in red arrow. Long ball in all formations
P.S. Level 30+ here. Top 4 finish every season. Not bragging, just saying, 'cause at high level, the game is a serious business... lol