Try this tactics 4-2-3-1
Since you are ManCity here is how you become unbeatable:
You will have to have basically 2 teams. And you will need to buy 1 more world class striker. Diego Costa can be signed on free or any of your choice that is either poacher or target forward.
I am attaching pictures of teams and tactics. First 5 pictures are first team (lets call it Team A) and second 5 pictures are second team (lets call it team B).
You will see that a sabstitutes cover every possible position on team except GK if your GK gets injured then tough luck
The second team as you can see no striker coz you have to buy it.
Now other than this you should have few more players as a spare in case some from the 2 teams go injured. Those additional players are.
1. 3 star goalkeeper (in Ath bilbao C team there is a future world class goalkeeper)
1. defender that can play both right or left
1. central defender
1. Central midfilder
1. AM RLC
1. 3 star striker.
One game is played with Team A and the next one with Team B ALLWAYS. That way fatigue will never be a problem.
During the game never change players unless:
1. A player is injured
2. Its a late game 75min+ and you are winning by 1 goal. Of opponents like Brentford, Watford etc do this
But if your opponent is Liverpool, Chelsea etc etc. Do this:
However. If you are behind in score after 65+ minute do this
But if you still behind in 80+minute or you are loosing by 2 or more goals after first half do also this untill the result is in your favour then change back to normal tactics.
I personally always leave the set pieces to AI to do it how ever.
Thats about tactics.
Now about coaches.
You should always be youth coach coz your youth intake will be better then
Other than that you should have another youth gold coach, fitness coach, attacking coach and defensive coach all golds ofcourse
Scouts can be up to your likes i personally go for all youth scouts
Physios: 2 prevention and 1 rehabilitation
Training:
All players younger than 23 are always set on intensive training and you train their main stat untill its 15.
Defendes - tackling BUT if the strength or is below 10 then Strength or Stamina then those first
Midfilders - passing
Inside forwards and shadow striker and poacher/target train shooting
The system of making young wonderkids into global superstars.
First of all ofcourse get your facilities to maximum.
The next step are feeder clubs:
Make leagues that you have feeder clubs playable to make the most out of them. ManCity have Spanish, French, Belgium. Holand etc feeder teams.
Once you have a new youth intake or you buy 16/17/18 year old that will not be in your current plans instead of reserves that are useless do him a run in feeders like this. First year when he is 16 send him to weakest playable league (Belgium) next year when he is 17 to Holand league, when he is 18 send him to France and when he is 19 send him to Spain. Monitor if he play games there coz if he is not than his loan is useless. If he dont play return him and loan him somewhere else.
Best team to learn the beautiful use of feeder teams and how to make a superstar from youth intakes is Athletic Bilbao. First because due to Basque rule all your game you will heavily rely on youth intake but also because they have feeder clubs in all spanish lower leagues. So you can loan youths from the most bottom league to the top untill they are built as players and ready to be tutored by a superstar you have in club so that in age of 21 they are ready to be superstars themselves.
This system tactics etc can be used in any team in any league in the game and it works perfectly. Shure you will loose and draw sone games but be patient and stick to it and every team you manage will be champions every year you play.
For me so far this system i use in Monaco, Nantes, Sunderland, Vancouver, Bilbao, Burton, Twente.... I won everything every year with all those teams.
I will write tomorrow also about personality of players coz some personalities should be avoided because they are disruptive for a team in whole.