If I understand the mechanics of hardness and piercing correctly, it is a binary matter. You either pierce the enemy by having a higher piercing value than his armor value, or you do not. Considering this, are anti tank gun support brigades viable without further AT line battalions? Would it be a good idea to attach just support AT to 20 or 40 width infantry divisions as any of the major powers, particularly when playing the Soviets or Germans, or would that just be a wasted slot, especially in MP? Thanks in advance.