Another consideration. How long to retirement. Based on my age I will never see the Max FO pay at UPS or FedEx, much less the max CA pay. At another carrier, yes. At someplace like Kalitta I have a chance of making CA pay in the next 10 years. As much as the max CA pay at FedEx or UPS? Nope. But probably more than I would make there as an FO.
Also, I think Kalitta domestic DH is 50%, but international is 100%: