Homepage static "Page" reference conflicts when using two themes

Right now we’re trying to set it up to do A/B Testing on two themes (using the WPMU Dev plugin), and the issue we’re having is this:

1. Both themes (Venus and News from Themeforest) require a static homepage, and both require us to link to a *different* Page for this, under Setting –> Reading –> Front Page:.

How can we make it so that this can be different for each theme without manually changing it each time we switch (as we can’t do that with A/B Testing)?