This is a very weird one. It's very hard to make it work, since this team has to be prepared to play crosses, which is definitley not a strenght at Barcelona, but I think this is the most reasonable outcome:

-Suarez and Rakitic are targets for high crosses, while Messi and Cou would be looking for cutbacks, leaving Arthur and Busquets as deep lying playmakers, Rakitic as a box-to-box, and Messi or Cou often dropping back when needed.
-As you can see, some of this players have the exact same roles as their counterparts in ZZ's Real Madrid (Busquets-Casemiro, Arthur-Kroos, Cou-Isco, the whole defense).