I use Mata as advance playmaker AMR. He is a complete monster there. He demolishes the Premier League. He has an season avarage of 8.15 and is leader in assists, player of the match and pass completion and he is 4th on the scoring list.
Even tho I have an amazing team with Lewandowski (S2), Florenzi and Ruben Neves. He is absolutely the very best.