Once the smoked prime rib has reached 122 degrees internally sear with the GrillBlazer, torch, or cast iron. If using the pellet smoker to sear, once the prime rib has reached 110 degrees internal remove it from the smoker and let rest. While resting turn up the pellet smoker to as hot as it goes. Once the smoker is up to temp put the prime rib back in and cook until the desired doneness is reached. Please take into account that the prime rib roast will carry over in temperature during the cooking process anywhere from 5-10 degrees so be sure to monitor the internal temp and plan accordingly.