Another thing about Geats; my peers and I were discussing whether to try to unrestrict the boost buckle or not after checking out the full roster. Caveat of that mainly being if Geats stop using the buckle, he'll get a speed disadvantage from the speed equal stuff.
The 9x boost is only applicable if he doesn't start out with it, since using Boost Buckle to transform into a Boost Form brings a 3x passive stat amp. If Geats start out as MonsterBoost form, the 3x amp would already be applied to him, equalizing with the hypersonic speed rather than the supersonic one. This should mean that if Geats doesn't use Boost, he'll be having a 3x speed disadvantage. Starting out in MonsterBoost form would net him 7-C AP/Dura (14.01KT)
The other 3x Boost Time active stat amp is unavoidable, bringing him to 42.03 KT. The big caveat of using Boost Buckle fully is that after performing a finisher (which Geats usually does after using Boost Time) in any Boost form, the Boost Buckle will fly away from his person and be unusable for the remainder of the match.
Even with this, Kokken Sabi would still have a wincon in that her attacks out-range him and the sheer area and magnitude of the air slashs would bring him quite the trouble even with his skill and experience. And with the change to speed equal, should Geats decide not to use the Boost Buckle (or even the Monster Buckle for that matter), he'll have a stat disadvantage (especially 3x speed disadvantage) ranging from manageable to getting killed by just breathing in his direction. Though if you don't accept unrestricting the Boost Buckle, I will concede and continue with the Current Geats.