The Weapon Mastery ability "focused weapon" feature says that the fighter "select one weapon for which he has Weapon Focus and that belongs to the associated fighter weapon group. The fighter can deal damage with this weapon based on the damage of the warpriest's sacred weapon class feature".
This applies to *all weapons of that type*, not just *a singular example*, right? I.E. I choose "Daggers" not "This really special Dagger I found earlier"? That's how Warpriest's Sacred Weapon works, so I'm fairly certain that's how this works, but...
I have a really interesting build I want to vet, but this is a central part of it.