A quick shoulder haul 2:1 with a micro-traxion is surprisingly easy.
A drop loop 6:1 is also quick to set up and will work with one hauler.
Rappelling into the crack to tend to an unconscious patient allows you to set them up with the drop loop while you're there anyway. Reascend to the surface and continue with a standard 6:1.
Additional pulleys have not been necessary in my experience.