On my 46% Ultimate Bipe I was running everything through 1 receiver, but I doubled up on the switches and batteries into this single receiver. No PowerBox, no regulators, no non-essential electronics. Just seemed like a huge hassle for nothing really gained, while adding more points of failure. I was using 8611s, with unregulated Duralite Plus batteries. Roughly 8.4v off the charger directly into the electronics, for over 500 flights without issue.

My setup was:
14 x 8611
1 x 8231 (throttle)
1 x 8231 (choke)
1 10ch Synth Rx
2 x Duralite Plus 4800mah batteries
2 x JR Charge Switches
Extensions all over the damn place.

Now, admittedly I have no experience in setting up 2.4Ghz systems with their multiple receivers, so I can't speak to that, but when I was running 72Mhz stuff, the simpler I made the systems, the BETTER my Rf link seemed to be and the less headache I had with the airplane. I see people all the time powerboxes, battery redundancy systems, and all sorts of other electronics in the airplanes that I just felt was adding more headache than it was solving.