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The Parrying and Bushido skills are checked during combat to determine
whether an attack can be fully blocked. Melee and archery attacks can be
fully parried if the defender is using a Shield or Melee weapon.
to answer the parry question: no it won't benefit you as an archer concerning actual parry chance. It will however count towards your total points for reduced special moves cost and thus can provide a certain benefit. The question is though if there might not be other skills that also count towards that total and have additional benefits for an archer