As far as Hassandra could tell, neither Toz nor his cats were overwhelmingly strong. Even if they held back in order not to kill the death mage with their strikes, none of them emitted the pressure of someone that was more powerful than her. If anything, it was the opposite.
The black-haired young man and the couple of cats that accompanied him were numerically weaker than the death mage and, by extension, herself. Their attacks on the death mage looked fierce, but they had only succeeded by taking advantage of minimal gaps in the mage's defenses. So, they were weaker, but they were still incredibly skilled and knew how to use their strength to its full potential.