Actually we need Ashley Young. Park is not good enough to be a regular or play in the big matches. However he is a very good rotational player.
Obertan we brought him because is one of the future hopefully and he will become a great player but he had an average to bad season.
Valencia is our best winger for me and definetely one of the best ten wingers in the world including number 1 ronaldo.
Tosic is not having the physical attributes to play regularly in a premier leauge match yet but he is one of the future.
Nani was the guy that I though he could replace Ronaldo. He was the only winger in the world when we bought him that he could replace Ronaldo both Physically and Technically. However after his fantastic first season it was like he thought he became a superstar and started playing like he was Ronaldo. If he cannot concentrate and work very hard and listen the guidance of Sir Alex then we have to bring Ashley Young and sell Nani. Young is definetely a more team player and a better player than Nani.