Assassins generally counter summoners, because after going invisible, they had a good chance of bypassing summoned beasts and charging straight at the summoner. As long as they could kill the summoner, the summoned beasts naturally posed no threat.
However, Zhi Yue was a somewhat different kind of summoner. Not only did she possess four summoned beasts, far more than ordinary summoners, but those summoned beasts also had plenty of group control skills, including powerful, wide-area Area of Effect Skills. When assassins went invisible, she could have her summoned beasts blanket the area with AoE attacks, easily forcing them to reveal themselves.
Once an assassin was forced out of stealth, Zhi Yue could then easily command her summoned beasts to kill them.
Moreover, while she did not possess an extremely powerful skill set like Ye Luo and his group, Zhi Yue still had quite a few movement and invincible skills. Since she had put all her points into Constitution, her health and defense were extremely high. In particular, she had learned Magic Guardian Shield. With all that, even if an assassin attacked her for some time, they might not be able to kill her, even if she were directly controlled.
Even if she were controlled, Zhi Yue could still command her summoned beasts to attack the assassin. The damage output of four summoned beasts far exceeded that of a single assassin, especially since assassins generally had low health, at least far lower than Zhi Yue's. In a battle of attrition, Zhi Yue would undoubtedly have the final victory against an assassin.
After defeating the assassin, Zhi Yue could restore her health through pills or her own recovery abilities. With her powerful regeneration, she would soon recover to peak condition.
In short, as long as Zhi Yue did not encounter assassins on