Nah, all weapons, including Fudo, with crit hit rate increases only apply to the hand wielding them (Of course H2H weapons apply to both hands because both use the same weapon). If you want to be unique than sure, but it will hinder your damage dealing capabilites. Typically for War, with their low sword skill, the only swords worth using would be the ones that attack multiple times.. (joyeuse and ridill)