Considering how wonderful interaction between Sanzo and Lucifer would be, I can only see this roof situation being a plus. He's going to have so many more problems with his personality than him being the literal devil.

For the Gifting of the Spray Bottle (and Sanzo getting smacked, lol) I suppose we can set that up once the Amberdrake offering to do more and Sanzo totally busting him on that scene is out of the way? I'm really looking forward to this.