Zhou Tian indeed demonstrated proficiency in the use of his Domain in terms of speed, under that particular situation, when Zhou Tian decided to dodge, those two Monsters just couldn't find any way to get to him.
However, clearly those two Monsters didn't see it that way. After Zhou Tian gained the speed advantage, the Monsters realized striking Zhou Tian wouldn't be easy anymore. But, no matter how difficult Zhou Tian was to hit, it still wouldn't change the fact of their great attack power. Seeing the destruction caused by their joint attack, the Monsters became extremely confident in their ability to defeat Zhou Tian. In their eyes, they already possessed the overwhelming destructive power to end Zhou Tian's struggle, regardless of how he might fight back.