Well...
I can tell you my experience in a similar platform to your hypothesis subject.
They work really good on 4 door JK's modified that has to be approaching your subject weight.
Thanks for your observations. They are helpful, particularly the analogy to JK weight and Skyjacker's focus on the Jeep JK aftermarket.
BTW, here are some general JK curb weights harvested by Google:
"Jeep Wrangler Sport: 3,970 pounds. Jeep Wrangler Unlimited Sport: 4,201 pounds. Jeep Wrangler Unlimited Sport S: 4,201 pounds. Jeep Wrangler Unlimited Moab: 4,345 pounds."
It could be that most of the salient Skyjacker Black MAX shock user reviews will be on the JK forums.