To anyone going to VAH, I'd prioritize what you want to do. If your plans include Space Mountain or Pirates, I would line up for one of those (separate line for Pirates, FP line for Space) about 10 minutes prior to party time. I would work your way across the park, stopping to hit the attractions (rides, food, Magic Shots) you like during the party. Hopefully, you'll be over at the other overlay ride sometime between 11pm and 12am-ish, as the overlay rides have had shorter waits mid event. I would definitely attend the 1am stage show, and the Maleficent prowl immediately afterward, as doing so will not cost you any ride or attraction time. Neither requires much effort to get a good viewing spot.