Soriano and Begiristain have a philosophy that you need 5 or 6 world-class players and the rest need to be good players that can be developed into top-class players (which is what a manager's job is and one Mancini is actually quite good at). They reckon that half the 50 players on our books are surplus to requirements as they will never be first team regulars.
We have Kompany, Silva, Yaya, Tevez & Aguero who can be considered world-class. You could possibly add Hart to that list. So that's the 5 or 6.
We have Nasri, Clichy, Nastasic & Richards who could become world-class. We have Zabaleta, Barry & Milner who may never be world-class but are absolutely solid and reliable team-members who will never let you down.
There's the top-tier of youngsters with Rodwell, Evans, Razak, Rekik & Guidetti on the verge of the first team.
Any first-team squad member not on that list, with the possible exception of Dzeko, can go in my opinion. That's Pantilimon, Kolo, Lescott. Sinclair, Garcia, Suarez, Scapuzzi and possibly Meppen-Walter & Nimely.