The sword law's notion of all attack and no defense not only signifies abandoning personal defense but also includes the operation of the Sword Rain Pool.
Even the World Secret Domain, meticulously refined by the Supreme Star, is an immensely challenging high-difficulty weapon for the law angel to wield. To ensure Ash and the others cannot breach the Sword Rain Pool, the sword law dedicates at least 80% of its focus on operating the "Realm of Suffering," the "Sorrowful Curtain," "Water Coffin of Tears," and the Sword Rain Pool itself.
Thus, because it can only deploy 20% of its focus, it was unable to retaliate against the female mages' attacks. However, this did not mean much since the "Realm of Suffering" and the "Sorrowful Curtain" likely reduced the female mages' combat power by over 80%. Without using the World Secret Domain, facing the sword law would be even more difficult.
