Mate, I’d say if you do these things right then it’s possible to win everything in this game even with any default tactic .
1) Proper squad building:
- You should have at least 3 equal quality players for every position in the tactic, in order to be protected from injuries/bans/tiredness that inevitable happens during every season.
- It would be very poor squad building having 7-8 super star players and other 14-16 players in the team are much poorer quality than these 7-8 super star players because during the season you need to use all 22 players to achieve success and it’s much better when all 22 players are similar quality.
2) Keeping “Match Sharpness” of all players in the team at high level
“Match Sharpness” of any player in the team should not be less than 85% otherwise he won’t develop or even worse his attributes will be declining.
Obviously, it isn’t possible to give every player enough playing time to keep “Match Sharpness” above 85% so you need do make some players to be available for Reserve/U21 team
Please notice, that you shouldn’t move players to Reserve/U21 team because it’ll upset them, you need just make them available for Reserve/U21, also please notice that your Reserve/U21 might not have any matches at all or at some period so you need to make sure that it’ll have some matches and to do that you should go to its fixtures and arrange some friendly matches for your Reserve/U21 team.
3) Proper squad rotation:
The logic is very simple – the higher conditions of your players compare with your opponent’s conditions the more advantage they’ll get over the opponent in the match
So it would be smart to use “B” selection in some unimportant Cup Match or Champions League Match and then use your “A” selection in a league match.
Or It would be smart to use “B” selection in a home league match vs the weakest team in the league to keep the condition of players in “A” selection for more hard matches.
I took just few example but there might be a lot different situation when your successes depends on your decision when to rest your best players and when to use them
How are you going to have 33 players in the squad and the minimum that they do not play are getting angry? You can not have Neuer, Buffon and De Gea for a position