All anchor material on Jagged Mountain was replaced during the summer of 2017. You can now rappel directly off the summit bolts. You will need either a single 70 M rope OR a 40 M rope and a tag line. This is my preferred method. Something like the Sterling Rope 5.4 mm V-TX Cord is a pretty awesome pull cord. https://sterlingrope.com/store/climb/cordage/high-tenacity-cords/5-4mm-v-tx-cord-2
You can also just reverse the route with only a single 40 M rope with minimal down climbing. For more route beta on Jagged Mountain don't hesitate to get in touch.