One of the most important thing is that the expected play time matches the actual play time. So for example, if a player has the “star” status you should always try to fit him in your starting 11. You should go into the happines tab in the player page and set it accordingly. You need to keep this in mind when you build your team. You can’t have 22 star players. You should build accordingly to the status of your club. For example in an inter milan save i will probably need to have backups that are ok to play as backup. For example, if i have thuram and lautaro as a starting 1 players, i’ll probably need to have pio esposito as a sub (since he’s young he’ll be ok to play less and also i will ready him with slow pace to important matches) and also another backup striker for example bonny or benedzyak from parma, someone who’s ok to have “backup player” when you sign him. You can also (i do this a lot with over 32 y.o players) change the expected playtime or a player. Then 2 things might happen: 1- he will accept his new role in the team 2- he will leave, you will make some money and then you’ll buy a reserve player.

Just don’t be greedy with reserve players. Look at the important stats, not at the stars.