Based on the Forrest Service roads here in Idaho, I find the air pressure in my tires make a bigger difference in comfort than anything. Second up is the ability of my shock to stay cool with the workload and not fade.
Granted, the majority of the dirt roads around here limit your ability to speed without sliding off around a graveled bend in the road. I would suspect your speed and the ambient temp would keep most shocks cool. I've got mid 90 and at most 30 mph to deal with.
With the KDSS bars, when I start sliding at least I am flat
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2016 TEP, KDSS, ALPRO Apex Sliders, Focal IS690TOY, Old Red's Accessory Meter Display Mod
, Rear Differential Breather Mod, Radium Fuel Surge Tank, URD Supercharger
, Ironman FCP shocks