A long time ago I had a dream of programming a somewhat simple code as a world boss simulator... then I gave up. True story.

I like the benefits of a boss practice in that you can test forms without being penalized in real banish, i.e. switching forms in the middle of wb and making lower damage than usual for the sake of experimentation. But the not-so-good part is that things would be too easy then, or at least much easier. An "ideal" formation would be much easier to devise with this kind of a feature, and that takes some of the fun out of banish.