Have you tried editing an existing guitar effect and seeing if the the changed settings are saved? To be able to edit an effect to what you want may be a better way to go rather than rely on what someone else 'thinks' the guitar effect should be for a particular vocal effect. Presets for effects can be helpful, but mostly just serve as a starting point to get to where you want to be. I don't have the Play Acoustic, but have the Play GTX which does have different effects for each vocal effect. Most of the guitar effects for me do not fit for the vocal effect they are with and I've mostly ended up editing them or sometimes just used an external effects unit. For the vocal effects you may use for your show, do some tweaking of the guitar effects to your liking and I think you'll be happy.