My opinion..... Why not just divide it in to two distinct separate flights. I.E. Amsterdam - Hong Kong then Hong Kong - Auckland. Anyway, I don't make those sort of decisions but I just thought I would put in another idea. Don't forget most long haul stops are around 2 hours for refuel / cabin clean / re-supply / crew change.
My Next question has to logically be, Who would actually fly these flight? Who is going to sit in front of their PC for 22 - 24 hours to fly half way round the world? I'm guessing almost nobody. Most will set it up, take off, climb, go to sleep, get up, descend, land, take off, climb, go to work / school, come home, eat, watch TV or do Homework, descend, land. Why should they be credited with 24 hours flight time when they probably spent less than a couple of hours actually commanding the plane? Just my thoughts, not those of the MT in general. What do you all think? If we were to introduce these sorts of flights, how would we guard against this?