When i bought mangala (the start of fifa) i didn't have very high expectations of him but he was all i could really afford and he wasn't the worst looking card i've seen. Since then he has been in my BPL team and now my Hybrid and is an absolute rock at the back for around 40 games and in those games only around 5 goals has been conceded and the majority of them were counter attacks form corners. He wins most headers that come his way making him extremely good at defending corners and lobbed through balls and he is also really quick, multiple times in squad battles he would catch up to players like Ronaldo, Bale and even Aubameyang. Whenever there is a loose ball he is always running after it and makes it with enough time to get off an effective pass off and he always sticks to his position.
Heading / High ball defending
Quick off the ball
Can nail a switch most of the time
You take him for granted at times
Hart to get multiple strong links to him resulting in a lack of chemstry from him (u need Kosceilny and Ederson)
Can't dribble well