Exploit Weakness + Pile on Help

I am not sure where else to put this but I need help... I see titan builds with exploit weakness on hammer of the gods and pile on in their passive tree. exploit weakness consumes the broken armor when used correct? So you get the 50% damage boost but the enemy gets their armor back before the damage hits right? Where I am confused is if you consume the broken armor when you use hammer of the gods does that mean the pile on passive no longer applies? So you should not use exploit weakness with pile on?