Shameless update from Dale Kramer

"Who knows, having propellers on 3 different horizontal planes during hover and that are so spread out versus their diameter, could reduce the chances of vortex ring state significantly."

Take into account the interaction between the upper propellers/rotors and the lower with wind affecting the downwash angle. To my eye, you could easily end up with blanking of the lower rotors or unpredictable changes in angle of attack with any wind.

Good luck. It's fun to solve problems.