Re: Bones As Armour
The right kind of bone armor, even if less than ideally useful in combat, might well give you a bonus to Presence out of the sheer intimidation factor of "I am clad in the bones of my enemies -- in death, even my foes protect me!". It may not be literally true, but it certainly would have an impact initially, which might buy you time to get in the all-important first strike.
That's more a villain thing than a hero thing, of course. Necromancers and the like might go for it.