Your post on Saturday has helped no ends trying to find players of CA 160+ Us the way to go but also keeping key players fit/ happy is a massive thing too !!
Let's say we build our club from scratch and we want that our club eventually become as strong and even stronger than Barcelona or Real Madrid so we need to know what CA players have in these clubs?
Let's look at the players' CA of Barcelona and Real Madrid. We see that all players from the starting eleven have CA more than 165 and some players even have 190, 180, 170 CA.
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Now we know that if we want our club were strong as Barcelona or Real Madrid we should have players with CA no less than 165 and 165 is only the minimal level but we also want to have few players 170, 180, 190 CA to be on par with Barcelona and Real Madrid.
Please notice that CA is total amount of points player has to spend on his attributes but it's also very important how it is spent. Sometime it happens one player can have CA slightly less than other player but on practice the player with slightly lower CA is better because his CA is spent more efficient, it’s spent on attributes which are more important for his role. For example, you don't want your winger were tall and strong you want he were fast and agility so should avoid his CA is spent on "Jumping Reach" and "Strength" and you'd better want these points were spent on speed and agility.
As you can see if your club consists of players 145-155 CA then it's nothing special and your club has similar strength with other lesser top clubs such as Liverpool, Tottenham, Valencia, Sevilla, Schalke and other... but if you want to be on par with true "big boys" such as Barcelona, Real Madrid, Bayern, Chelsea, Man City then you should look for players with minimal 165 CA level and also you should have in your team few 170, 180 CA players and having such players in your team only make you equal with these "big boys"

and if you want to be even stronger than these clubs you should look for players 180+ CA.
CA = Current Ability is total amount of points that player has to spend on his attributes. It varies from 1 to 200