I have an older model (2005) Dodge or Ram 2500 or whatever they are calling them this week.
it has a very stiff suspension, the only tire that I have found that drives and rides properly with that suspension and 70 psi is the Michelin.
I have tried other brands (as Michelin was having that sidewall cracking problem, seam to have that problem solved)
I would go with Michelins, just my two cents.
when you load heavy and pull hard, tires are going to wear out.
the harder the rubber, the rougher the ride, may get more miles, as no one wants to ride in the thing.