thegreatgarry : I already put him in his favorite position, the AMR with the inside forward instruction ...
One thing you should know is that this season Messi has rarely played on the right like you have suggested. The emergence of Pedro within the team has meant Messi moving behind the striker in a more central role.
If you watch any games of Barce, you will see Messi essentially given a free role. He drifts around, switches with wingers on both sides and is generally allowed to play where and how he likes. This leads to him finding space close to the box where he can view all players in front of him an begin a run through the opposition.
My suggestion would be to play him in the AMC position either as an inside forward or a trequartista. This will allow him more creative freedom to roam the pitch, pick up passes and play one-twos. Also, this ability to move will mean him following up strikers to poach goals, drag a defender wide whilst the striker moves with the ball etc.
