Sacred Weapon mentions that any weapon selected as a Weapon Focus can be used, and Weapon Focus specifies that Unarmed Strike can be selected as a Focus. I'm not sure if that works with Sacred Weapon, I figure Warpriests aren't meant to fight unarmed.
Looking at the Sacred Fist archetype, I see that both of those weapon abilities are replaced. But that leaves me with a question: With so many Minor Blessings saying "touch one weapon" targeting weapons rather than attacks, is this archetype (by not holding a weapon) unable to use these blessings on itself? Is there an alternative interpretation of this text, or should a Sacred Fist just be aware of this limitation while picking Blessings?