O Feat Daisho Expertise diz:
Prerequisites: Proficiency with the katana or wakizashi.
Benefit: Increase the damage die of katanas and wakizashi you wield by one die step. In addition, you may use your Dexterity modifier instead of your Strength modifier when making attack rolls with either weapon. This feat counts as Weapon Finesse for purposes of meeting the prerequisites of other feats.
Special: If you are proficient with the katana as a martial weapon, you meet the prerequisites for this feat, although you only gain its benefit while wielding a katana in two hands (to gain these benefits while wielding the katana in one hand, you must possess Exotic Weapon Proficiency with the weapon). You must possess Exotic Weapon Proficiency with the wakizashi to gain the benefits of this feat with a wakizashi.
E a Campeão de armas Arquétipo tem o Armas Favoritas (Ext) recurso:
At first level the weapon champion selects a group of weapons (from the fighter’s list of weapon groups for the weapon training ability) to act as her favored weapons. She is proficient with all these weapons. If the weapon champion has a feat that applies to one of these weapons (such as Weapon Focus), it applies to all the weapons in the group.
O wakizashi pertence ao grupo das lâminas leves.
O recurso de nível 1st do Campeão de Armas agora faz com que todas as lâminas de luz usem o atributo Dex para atingi-las e tratá-las como se um dado fosse mais alto por danos?
Porque, tanto quanto eu posso ver, o wakizashi atende aos critérios 2, pertence ao grupo de lâminas de luz e faz parte de uma façanha específica da arma que pode ser aplicada ao grupo de armas compartilhadas.