I am also a reverse sere fan, though for cuts like sirloin. I think I'd go with a traditional cook for the rib roast, but that's just me. I haven't tried it, so I can't speak against it either.
@olbriar, your mention of the hot box reminded me of my newest tool for cooking. I haven't tried it yet, but I really like the concept. The temp probe tells both the meat temp and the ambient temp and it is wireless. So the probe talks to the base, and the base talks to your phone. I would leave my probes in when I put stuff in the hot box, but is was a challenge to wrap the meat around the wires from the probes to the base. This eliminates that, and still allows me to monitor temps in my hot box.
https://smile.amazon.com/dp/B0BKQJJZ1S