Not crazy because you have flights with beds, so u can just sleep whenever tired.
I would consider this torture if it was all domestic J/F
Doing TBU-AKL-SYD-MEL-AUH-BOM-BKK-ZRH-BRU-EBB-KGL straight in a couple months, with only 12 hour breaks, but EY F apartments, and the new swiss 777 will ease the pain i m sure.
Did HKG-TPE-HKG-BKK-NRT-LAX-LHR-DOH-CAN-BKK-NRT-ORD-YYZ once, taking advantage of an NH F mistake fare (TPE LAX $400, LAX BKK UA award on QR, and one of the RGN tickets BKK YYZ). Trip report:
http://www.flyertalk.com/forum/trip-...ast-month.html
It took 5 days. 33600 BIS miles. Lots of mileage as it was full F/J