I would humbly suggest submarine crews as control group.
Canned air, tight space, weird sleep cycles, noise and artificial light. Submarine crews are even more isolated because they can't contact families while underway.
I'd imagine this whole "being strapped to a ton of explosives and using them to fly" moment is a tad bit more extreme and stressful than a submarine dive.
After that, they both have similar constant stress factors, but imho the launch alone is probably way more than what anybody on a submarine would go through.
Also airline crews? They get to do their high-pressure job in lower-than-normal air pressure, they get shaken around in a tin can and their sleep schedules are shot to hell.
Canned air, tight space, weird sleep cycles, noise and artificial light. Submarine crews are even more isolated because they can't contact families while underway.