With the separation of Bushido and Parry, this specific Mask of Travesty seems to be one of the least useful (even the Ninjitsu / Stealth mask will compliment each other). Maybe the mask could be split into two separate masks, offering Bushido / Focus, and Parry / Dex, or Parry / Swords?
From my understanding the only other quantifier with parry and shield is dex, but rumor has it that Focus plays a roll in the Bushido parry / dodge chance.
