If we can have a forward line of Balotelli, Aguero, Dzeko and Tevez in our 25 man squad we'll have the strongest strikeforce of any Premiership squad, by a distance. Chelsea with Drogba, Anelka, Torres and Mata would run it pretty close, but Drogba isn't the player he once was, and Anelka is the wrong side of 30 now too.
I'd keep Tevez, although it looks like even if we wanted to get shot of him there aren't too many takers at present. He's a quality footballer. Ok, so his bahaviour and attitude off pitch could definitely be improved, but he never lets that interfere with his on pitch performance. No squad is weaker for having Tevez as an option within it.