Bakkali is an interesting prospect. any numbers mentioned?
If we go for an offensive player, isco should be first choice if the price is right as he would improve the starting eleven.
I also like Shaqiri but without another great winger we would look weaker than last year (giovinco/tevez?/morata?- lorente/tevez/morata-shaqiri/pepe) he also can play behind the strikers but much of his quality would get lost.
Lavezzi same as Shaqiri, better player atm but also approaching his thirties, if we could get him on loan great if not we should look at other options
pastore i don´t know never really impressed me but i could be wrong, would rather save the money
jojo could work but probably would be more of an rotation option
bottom line only isco would really improve the first eleven, if only 1 "big" transfer is possible