If you're gonna stay with these 1st stages, you can get it to work, but it really doesn't feel as right as a swivel + 5th port.
The way i did it on FST (fully standard package), SPG (standard length) down and back up so it fits close to the valve. Octopus the same way (careful not to have them entangled). Short hose going up (else it was too short to breathe from). BCD inflator going down, through the first hose retainer, then running along with the corrugated hose. A miflex would have helped there. The way for the inflator is OBVIOUSLY not right if the hose comes from above your shoulder.
Didn't have a drysuit.
For the hoses at the 1st stage, turned it 90° so there were hoses going straight up and straight down. Up = regulators, down = SPG, inflator. With a drysuit hose running down, that starts to make quite a lot of hoses running there. (4 LP and 1 HP)
Had I kept this reg, I'd have bought: 90° elbow for the inflator, short hose for inflator, long hose for octopus, short SPG. (because it looks like my spg is doomed, can't open it to change the hose). It's true that you add a "failure point" (yet these guys have a swivel turret), but the stress you cause is very small if you're careful.
As for "i don't miss a 5th port, but i need a turret", that's rig dependent i guess.
Finally, rather than trying to fiddle with something that doesn't suit and spending $$$ on it to try to have something that's about right, i just bought a new one. If i were you I'd save for a while rather than getting the right length of hoses, angles etc. Except if you have them for free obviously.