meph when a composer more than two staves is not to make it more difficult for you but to facilitate the reading and learning process right? think if opus c. was written on one staff...it would be near impossible to learn in a lifetime. Yes you have to decide which hand plays what just like other difficult pieces. I think you should look at1. where you're hands are coming from and where they would need to go2. I think which ever melodic/rythmic/etc. idea is most important to you would be your guide in finding out the best way to coherently execute your chosen idea. possibly. ask on tha sdc i will possibly be able to express myself better.
that is a piece by rob kawasaki, a very well respected respect-d composer.