Update: Dobinsons suspension. I decided to give my thoughts here since his is kind of a build thread and it might be easier for people to reference...
I went with the heavy springs up front 80-100kg C59-314) even though I don't have any bar work for dual battery. For the rears I went with the heavier of the mediums (300-400kg C59-329) and their twin tube shocks.
When we are at 90L or less on fuel (we have factory dual tanks) and are empty, this thing lets you know those rear springs are there

It is very controlled at all times, but it is harsh. 180L of fuel, light camping supplies, ARB fridge, and 10L of water it is a bit better. We do have a hardshell RTT.
Blasting down corrugations, this thing is brilliant. Very controlled, the ride is great, braking is great. Actually, anytime it is in dirt it feels perfect.
We've got one shorter trip planned that is coming up and one bigger one. The bigger one will be in rougher conditions and require us to keep the tanks full and pack 50L of water onboard. I'll give and update on that one.