The key for in this tie is the forward line and midfield. The best way to compete with City is to keep the ball away from the trio of Nasri, Aguero and Silva. limit their possession and you give yourself a chance. Sit back and let them have it and they'll unlock you soon enough.
Therefore a strong midfield and a forward line that are prepared to press and harrass their defence. Keep the ball. Easier than it sounds but I'm sure it's the way Kenny ultimately wants to play as well.