That's exactly why I run the E rated tires. I've torn way too many C and D's to bother messing with them in a Jeep that sees off-road use. With the right suspension setup and shock valving, next in the order is air pressure in the tires for a comfortable ride. Forget the thinner stuff. My E rated 255/85's have held up in places larger, more aggressive C and D's have been torn. I have about 55K on my current BFG MT's and fully expect the Toyo MT to go that long as well, if not more. Rubber compound is similar. They're a tough tire all around, run true, balance very well and LAST both on and off-road.
I did just tear a sidewall in one of my BFG MT's, down on the Rubicon. To be fair, as mentioned I have over 55K on them and was running around 6 psi in some sharp rocks. Plugged it at first, but then tore up into the block of the tread. When it separated, I stopped messing with it and swapped the spare on. Hummm, that reminds me-better do something about a new set of tires soon-don't like running without the option of a spare where I'm at...
Best of Luck,
Mike