ok i get you, i was mistaken on the cost of the other weapons.
its a very powerful weapon, it just seems to be too good of one in a few instances.
maybe im over thinking it.
i still think it should give some defense of some kind. in fact i think most two handed weapons should unless they are purely offensive.
also, in terms of power, this is much closer to a greataxe than a halberd. maybe a pike.