It's a pretty great ability (I think?) as is, I'd just suggest a minor-ish change.
Instead of having it require riposte, which itself requires sword weapon speciailization (swords: 500), I wonder if it'd be acceptable to have it instead require:
perception: 200
dodge: 200
melee: 500
ability: melee focus
ability: melee: feint
This suggestion maintains the ability commitment of the existing mitigate requirements, but shifts it away from a "sword only" lock. I realize that swords are predominately the most popular form of weapon within the Tse Gaiyan, and Clok in general, but this should free people up to engage in other weapon styles, even if swords remain dominant. It could be argued that the substitution abilities I've suggested have more utility than weapon spec: swords, and riposte. I think it's a very close comparison though.
Mitigate
Re: Mitigate
Never been fan of locked ability for certain specialization, so thums this one up!
[CHAT - Event Staff Uyoku likes NOM NOM NOM food]: You are holding a pepper-grilled Uyoku in your right hand.
This GM has been peppered and grillef over an open flame to a juicy perfection.
This GM has been peppered and grillef over an open flame to a juicy perfection.