five AM players is good enough becouse most of chelsea games last season played with 3 AM players like hazard - oscar - willian And two additional players gives you more options in case of injury or decrease preformance of any players in long season add to that mourinho said " we have willian and oscar at no 10 " thats mean the wingers will be to hazard - salah - Schurrle salah has Has a different style of play he can play second forward and he's very Useful to bit advanced defenses Depending on his movement, pace and dribbling like his match against vitesse he was very denger and scored goal and had potential to score more .