Cisse is not the player to worry about/replace in our starting eleven. He will score when he gets chances. I don't see the problem being Cisse alone upfront, more the movement of the other players around him.
His confidence is low but it can be easily fixed if he can get few successes. Confidence is a weird thing. I remember being very low on confidence, scoring the ugliest rebound goal in the history of sports and playing great again.