Squad Rotation/Substitution run outs is it worth it?

[mmunger]

Should I just stick to exactly the same XI instead week in week out and not make any substitutions except for injuries or tactical reasons.

What are your goals? Do you focus on the league, or also want to compete in the Champions League and Cup?

If you want to be good in all competitions, you have to rotate.

Young players get tired when playing 90 minutes or training hard, but they gain skill points faster. You want to have other guys to back them up.

Older players get tired faster than, say, 23 to 27 year olds. You want to sub them out sometimes to prevent injury.

If you want to compete for more than one title and manage energy levels, you must rotate.

[An Bainisteoir]

What are your goals? Do you focus on the league, or also want to compete in the Champions League and Cup?

If you want to be good in all competitions, you have to rotate.

Young players get tired when playing 90 minutes or training hard, but they gain skill points faster. You want to have other guys to back them up.

Older players get tired faster than, say, 23 to 27 year olds. You want to sub them out sometimes to prevent injury.

If you want to compete for more than one title and manage energy levels, you must rotate.

I try to win everything I enter but I am not that bothered if I get knocked out of the cup competition. I find that the cup is too early in the season for me and it does not give me time to make changes to my team.
For this reason I prefer the Champions League and League. There are plenty of chances to rectify previous errors. I try to get to the quarter finals/semi finals of the champions league, at least. I also try and win the league/make sure I qualify for the champions league.

From a substitutions perspective I noticed that I rotate about 4 players max to keep the squad fresh. I always bring on a least two subs if I am watching a game.
I am only level 4 at the moment so I do not know if these tactics will work at higher levels where there are not as many dead/tanking teams.