Zavier felt slight humiliation when he had to take down such vigorless enemies but that didn't mean that he wasn't happy with the current situation. He wanted the current state of his enemies to last for as long as possible. This was also enough for his group to get a breathing room.
As he had expected, it was not long before a leader appeared out of the group. It was Gabby who had climbed up a favourable spot within the battlefield and was visible or at least audible to all the members of the alliance from his position.
In fact with his magic, he could have easily influenced everyone from wherever he was on the battlefield but visual stimulation was the best there was. Therefore, he not only used sonic waves to increase the amplitude of his voice, he also put on a brave front as he stood at the top looking down at his subjects with benevolence and grace that befitted a leader in times of crisis.