Either way, you should consider doing the ending like this: The best of both endings! They begin to notice strange things happening, and Ash and Scott discover a weird book and a tape recorder in the basement.
Though it's a mutual affair the finale pulls it more into a with Baal believing himself the one in charge and Ruby sick of him to the point she's trying to undermine him.
Ruby really works it by asking her if she feels safe with her father.
He blows smoke in Ash's face and continues chanting, and Ash sees an eyeball in his mouth.