I play an assymetric 4-4-2. Messi pulled back as explained and Busquets as a left DM (DLP). Dembele plays on the right midfield as a winger and Iniesta on the left as a WP. Rakitic is a right central midfielder (RPM).
Try putting Suarez in the left side of the attack, as a DLF/Support with the following instruction - Move in to channels. Then you put Messi in The right side of the attacking midfield, as a TRQ with the instruction - Shoot more often.
Works wonders for me!!
Cheers