[cobinder]

This begs the question, does a shock dampen the wheel as it travels up or the weight of the chassis as it moves down?

If it is the wheel (pro active) as it moves up then the weight tire and wheel assembly would have an affect on the damping of the shock.

If it is the chassis (re active) then a single damper sized for the weight of that corner of the chassis should be enough.

Off-road race trucks take great pains to get their suspension,wheels and chassis as light as possible which helps reduce the amount of damping force it takes to offer the best ride for them. Because they have such long amounts of travel which results in high piston speed they produce lots of heat. They run several dampers with light resistance to reduce the heat.

In my case I have very heavy wheel weight hence my concern

Powder balance is the only way to go on the big Michelins