Chiptole,
I understand what crossing a time zone is, I have done it for a very very long time.
But flying 4 or more sectors every day, were you start at night and finish in the morning, by midday you are supposed to take your 10 hours rest. and back to the airport to start another 12 hours duty.
Every month 90 plus flight duty hours, with around 70 sectors per month.
I did ask the management to try one week of the schedule, but as always they had much more important things to do. Then I asked the planner to sit in the jump seat for a week and see if would be able to stay awake. but that was not possible either. all because the computer said the flight was legal.
So my advice to all, try to get into management as soon as possible.