Well yeah, and there's this "system" thing too. Can he fit or can we make him fit?
Yes, if we got a massive budget, definatly yes.
we could field 4-2-3-1, with pastore as a trequartista, krasic as winger, sanchez as inside forward, central midfield by defour and inler, and aguero as the complete forward.
why ?
cause pastore and krasic in the same formation will play one horribly out of position, and both are limited
because we need a kickass leftwinger to make up for pastore's lack of goalscoring
because with all that creative, we need balls and defensive skilled players in the midfield, like defour and inler
because matri isnt a complete forward, and quag neither, and apart from aguero i dont see much avaibale complete forwards.
for our budget, getting sanchez, and playing him inside forward and krasic winger on the other side, quag as SS, matri as ST, and a deeplying playmaker and a destroyer in the midfield
would be more realistic