Keep in mind, everything I say in here is strictly my own opinion and reflects what I have experienced using this Card.
Recommended Chemistry Style: Basic; Reasoning: Boosts all of his stats, besides pace, to 80+.
Nainggolan is the complete package, the ultimative Box-to-Box player who shines in almost all areas of the pitch. He protec....he attac but unfortunately his passing is somewhat whacc.
I was one of the lucky ones to pack Nainggolan in one of the weekly packs (Jumbo Premium Gold Pack) you get by buying a special edition.
To this point, I have played more than a hundred (100+) games with Nainggolan. I've used various tactics as well as positions in order to get the best out of him.
Nainggolan shows excellent skill when attacking. His ability to position himself and make accurate support runs is very crucial to my attacking play.
His shooting is not as good as it was last year (mostly because EA has somewhat fucked up shooting in FIFA 19) but most of the time it will be enough.
In my case using normal shot was more effective than using finesse shots, even if finesse shots are still too strong. (Pre-Patch).
Intercept/Tackle -> Counter
This is something Nainggolan shines in. Thanks to his High/High workrates and his 80+ Defending and Physical, he is everywhere on the pitch. He knows how to take the ball away and start an attack in very quick succession, something that goes very well with fast wingers/strikers in a 4-4-3 formation who have been told to stay forward.
Issues with passing
I am not the first one to notice this here on futbin, but there is something wrong with his ability to pass. His normal ground pass is completely fine, but putting balls through is something this card seems to be struggling with. Every through ball goes where it shouldn't go, no matter if threaded or lobbed. His passing stat isn't low and Chemistry Styles like Deadeye or Maestro surprisingly have no effect whatsoever. At the moment, this seems like an odd bug. It's not that big of an issue and most of the balls still arrive, but it can be frustrating sometimes.
Passing (mostly through balls)