As you're one of the key plan makers, a thought:
Nominally, our obligation to our hidden handlers ended with Van Hal, though Boney said they'd probably try to continue to pull our strings if we'd continue as Spymaster. I think also, probably, if we stay in Stirland.
If we want to get out from under our hidden masters, it's probably (a little) harder for whoever it is to secretly order a full Magister around, than a Journeywoman. We'd also probably be in a better position to tell them to get stuffed, if they try to bring us back into the fold.
I think we should make Magister a priority, after the immediate aftermath, but before the new Status Quo emerges.