I would like to see Nasri alongside our defensive midfielder. Needs to work on his defensive grit, but would be ideal for the transition from defense to attack. He wouldn't give the ball away stupidly, he is always accurate with short passes and can find the long ball, and has the ability to dribble out of tight spots.
Most teams have a player who is particularly strong defensively playing a deeper midfield position, because you need the passing ability there. Nasri and Barry with Yaya pushed forward would be dynamic I think.