So, i have this team http://imgur.com/a/WPx8C
plus 450K coins. On the bench there are Dybala and IF Alejandro Gomez. Since i bought Higuain (who is fantastic),SIF Mertens doesn't contribute that much to the team and Gomez seems to be doing better. I bought Mertens when he was 567K so i'm making profit on him. I'm thinking of selling him and either a) Get IF Mertens and IF Nainggolan or b) Get SIF Nainggolan. There is also a possibility that i'll be able to afford both IF Mertens and SIF Nainggolan depending on the price fluctuations, however this will leave me with no coins left.
What do you guys think would be the best option?