They are not worried, according to them; we are not short of pilots. That's probably why all WY captains are now undergoing simulator training to qualify for right seat flying.
And that's probably why they have wet leased the seventh 737 and delayed the delivery of the next Oman Air 737. I wonder how much that cost? Probably a different budget, so no worries.
Rostering in Oman Air is very complicated. After all, there are 7 B-737 to crew! Massive task!