I am not shifting from my zero tolerance stance on falling asleep as pic.
I am not claiming to be superhuman but my skipper and I would always be well rested for a long haul across the pond.
We did have the luxury of a third crew member which allows a rest during the flight but I defy any self respecting commander to sleep when travelling at .75 and having 300 souls on board.
Yes it gets tedious calling levels and headings for most flights and we would welcome some chop or a unexpected level change just for "something to do"
Falling asleep is as funny as a fire warning in the cruise and I would bin your epaulettes as a consequence