Stephen Felker wrote:With your third hand?
Not at all. Here's two different examples.
At the top of a pitch: Clip into anchors with quickdraws, unweight the rescucender, remove it from the rope. Tie your prusik to either strand of rope, grigri strand or the now free strand, and attach to belay loop. Pull up your grigri, remove extension, reattach your grigri to your harness, pull it taut, pull up on the anchors to unclip your draws, lower.
Halfway up a pitch: Pull your grigri up to rescucender height. While hanging, tie your prusik, attach to belay loop with either your quickdraws for clipping the anchor, another locker or (not recommended), pull on a hold to unweight the rescucender and use that locker. Once your prusik is on, then unweight the rescucender and remove, then lower.
Perhaps this isn't the most efficient means of lowering or top rope soloing in general, but for what I have it works well. For what it's worth I've tried bringing an ATC up and tried rappelling down as well, way more work and way more sketchy to me.