Hi DJ Paul V. Barring exceptions (for example if the vocals have a similar tone of voice, or if technically I have no choice), I avoid leaving several voices on a mashup because I find that the result is less homogeneous.
My only suggestion would be: if it can work getting a few Siouxsie vocals in there too (either the chorus or a verse), that would elevate this even more. Wanna give it a try, see what you come up?
