Thanks Desiderius, you're always helpful and willing to spend time to test new things and give feedback.
The kinda sad thing is that in my yesterday level 10 Drezen Sword of Valor test build, artificially raised to MR 4 to get the Trick (well, its less then half a chapter away in any case), I managed double the AC (granted, buffed) and almost same buffed Mobility score (once we remove the OP late game items and one of Stealthy/Monkey) at 43 - incidentally same as Staunton's CMD (I now wonder if I had Heroism active). Not enough to fully reliably troll Minagho, but I guess she's supposed to be a little OP at that point. And I think with Mythic Skill Focus to only roll 10+ it would have been enough.
Even sadder that I guess the damage output on the Kitsune Sword Saint might have been quite a bit better as well - I finished the revived Staunton with a 370+ Mythic Greater Vital Strike crit. Nothing impressive in Wrath, but not bad at this point for a Dex build without Power Attack or the size buffs yet (though I doubt I'll be able to use them in that configuration).
Big Ard Gaming managed 106 Mobility here (before short term buffs, like Touch of Madness/Touch of Good and such):
https://www.reddit.com/r/Pathfinder_Kingmaker/comments/vkelch/trickster_mobility_3_viability/