Honestly my setup philosphy has always been “loose = good”. And after riding so much on duality trucks, I no longer believe that tight can ever be good.
These trucks just give me all the stability I want, while I can run them wayyy looser than anything else.
This is how loose I run my racer’s front trucks at the moment. Hitting insane speeds on, putting down 0.8-0.9G of acceleration and braking. It’s just stable. I don’t even need to think about weight distribution over the trucks from a stability perspective, only from a traction perspective. I liked a bit tighter setup than this while I ran that, but to have a healthy amount of preload going tighter requires 100A WFB and I haven’t talked to Riptide yet about those.
Back in my channel truck days I also prefered loose setups, even for mountainbike trails, but loose channels and loose dualities on WFB are very far apart.
One thing I can say though, back in the summer I did a bit of offroading on my 2wd iteration of the racer on dualities, and I didn’t mind the loose trucks even for hitting some ramps, although by your standards those ramps were probably fairly small 
maybe like 45-50cm height with no downramp, but challenging enough for me especially with a 25kg board.
Honestly I am very scared of riding these channel trucks again after exclusively riding dualities for nearly half an year now. But the Duality swap won’t happen on this board until esk8con.