@Boney Would it be worthwhile to try mapping/examining Nagarythe's network in the same turn as the elfcation plan? I'm unclear on how much these actions are "things we can try" vs "things Mathilde actually expects she can get results from" given the presence of Athel Loren and Nehekhara on the list, and the elves are less hostile than those two but possibly more secretive.
It'd be possible to try, but Mathilde won't be able to get a read on how worthwhile it would be until she's actually there.