There’s a lot of different types of “wheeling”.
Folks that are dragging things through bedrock will be using more of their suspension. Trails around here tend to be river bed round rock, potholed trails, and deep mud holes through narrow trails. Most of which don’t need intense articulation but...
I don't have the delta arms, but I have had 37's and 38's with stock arms. I now have stock arms with new frame bracket/mounts moved down a couple inches and forward about 3.5" and 42" tires. The brackets are probably a pinch lower then they needed to be.
I can tell you that 37" mud grapplers...