There is a variation on this attack which comes in the form of an additional melee strike, in succession to the first. Can be evaded by side-rolling at the appropriate time (around the peak of the limb's height, just before he slams it down.) Or, if your Endurance allows maximum movement speed, strafing will suffice. Ceaseless Discharge will groan and slowly lift a limb up high above his head, before slamming it down with great frontal distance.