In order to protect Kaylie and get her to the church alive, it is easier the more people that you have. The more people there are, the more of you there are to watch her and fight off enemies. Also, when fighting the gargoyles with Kaylie, have at least two people playing. Have one or two people stay with Kaylie and protect her from little monsters such as zombies. Have the others kill the gargoyles with melee attacks, which at the same time distracts them, and they will not attempt to hurt Kaylie.