I know that the Hobbit Forest section, the Upper Oldham Trail, and the Rocky Ridge Trail are all somewhat technical. I haven't ridden the trails on the northwest side (left side of Schultz) of the map, so I can't comment on those but everything on that mountain is excellent.
I would suggest you post up to the AZ board and ask what's technical on Elden. I'm sure you'll get a few responses.
Pat
"The secret of joy is the mastery of pain." (Anaïs Nin)