Burchey, regarding your first map, line between Whitney and Russell: I once tried climbing Whitney that way, and got into stuff that was waaay too steep. I saw Rick Kent climbed that route in the summer some years ago. But that was summer, and climbing, not descending.
Bob Rockwell climbed Russell via the Sakai Col above Upper Boy Scout. Here's his picture report:
2010-07-09 Mt. Russell. Near the end of the photos is a map of their route.