Excuse my ignorance: can't use swiftcast while synced?

[KisaiTenshi]

I would always have Swiftcast as the 3rd skill (since it's level 26). Protect and Cleric Stance in the first two as those are important. "Welfare" stoneskin is not worth using in any of the first three slots when you have Adlo.

Cross-class doesn't care about the level of the cross-classed skill, just that the slot would be available. Swiftcast is level 26, but I've been able to use it even when levelsynced since it's in the second slot. Point of interest... You can't actually make use of it until level 28 since you can't raise during combat (CNJ/WHM,) but you can use Resurrect (level 22) on ACN/SMN/SCH.