The absolutely least-exposed descent (without doing the long hike off the back) is linking the tree-ledges (as seen on the right side, in the topo) and taking it down to 120 (towards the wilderness center parking lot, also on the topo). This is 3rd/2nd class the whole way if you hit it right. All other (non-hike) descents require 4th or a little 5th class scrambling/slabbing. If you are soloing you might consider descending the mountaineer's route for a little extra rock time and a very speedy way down.