Most games that have attack animations or a wind up for the attack usually have some form of a parry or counter move you can perform to reverse the attack and knock the enemy back (Reversals in kingdom hearts, Parrying in dark souls)
so my suggestion is, why not bring something similar here?
when the enemy reaches the peak of its attack charge (when the circle below it forms completely) if you hit it with its weakness at the right moment after it forms you can knock the enemy out of its attack and deal more damage to it