I mention Voidfang in my post. It is nowhere near to the abilities of Armamentarium and limits you to the void subclass. Praxic has to be worn instead of Voidfang because it's the same slot. Again, it comes nowhere near Armamentarium! And limits you to the solar subclass. It does not give you an extra grenade in every situation, and the effect is limited to the super. There is no comparison. I cannot understand why you would think they are comparable to the titan chest armour. Theya are not, Which is my entire point.