Two legs per day sounds like a good pace. When I flew to Osh from SoCal a couple weeks ago, I did three legs of about 3 hours, 15 minutes each to end up in Carroll, Iowa. Loooooong day! Like chartbundle, I was bucking light to moderate chop all through AZ/NM (with a touch of tailwind, though), so that stint seemed like 5 hours by itself. It's the one trip where I regretted not fitting autopilot!
On the way back, we chose to stop in Dalhart, TX (in the Panhandle) so we could depart 0-dark-early to get to Winslow AZ before 9 a.m. Even so, we probably put an extra 0.7 on the Hobbs jinking around T-storms. It was a fantastic experience...my longest trip before that was a flight from SoCal to Chandler, AZ.