Flying Mobs

I've been looking around this site on how to do flying mobs, but all i'm getting is "use bat AI." My point is that I want to make a flying mob that will retain its health amount, drops, and have the ability to shoot things at the player. if i'm not mistaken, such a mob is not possible to create with MCreator right now. I would like this to be looked into for MCreator 1.9.0, along with better ranged attacks.