Could one possible protection mechanism be to keep an ascender clipped to the back of your climbing harness, even if you don't normally use it? Then, as long as

Could one possible protection mechanism be to keep an ascender clipped to the back of your climbing harness, even if you don't normally use it? Then, as long as your were conscious and not too injured, you could attach it above you, and hang from it at intervals to get the weight off your legs, (while waiting for rescue) and to help with rescue?