Tell that to Biggest.
If you have the coin, go for both!!!
I've got the coin for a blower to go with my long travel front, but will be faster offroad by funnelling those funds in to a linked rear end. Still has lots of power, and the long travel front is a quantum leap over the usual 3.0 setup as far as carrying speed offroad.
Biggest has gone down the rabbit hole, so to speak, on the 6.2. There comes a point where building power just becomes an engineering exercise rather than a practical need. Been there, done that. Repeatedly.
Now if he were to link and long travel his truck, he might be able to apply that power offroad.
Really, it just depends where the truck lives. In the dirt, focus on suspension. Primarily street, focus on power, and light suspension mods.
I've yet to see anyone go all the way on both the motor and the suspension...