There is no pre-requirements for this archtype but all of the abilities are based off of a natural weapon. Would these attacks apply to you fist? So combined with IUS the archtype would work? Or do you have to be some kind of monster race to use this archtype?
Yah, i think it's intended for characters with actual natural weapons. Wildshaping druids, toothy half-orcs, kitsune, etc.
I think there are better fighter archetypes if you're going the IUS route, anyway.
There is no pre-requirements for this archtype but all of the abilities are based off of a natural weapon. Would these attacks apply to you fist? So combined with IUS the archtype would work?
Strike, Unarmed: "Unarmed strikes do not count as natural weapons (see Combat)."
Improved Unarmed Strike doesn't change this.
A monk's Unarmed Strike class feature treats unarmed strikes as both a manufactured weapon and a natural weapon for the purpose of spells and effects that enhance or improve either manufactured weapons or natural weapons.