The reason Ye Mo didn’t go with Ning Qingxue and Chi Wanqing was because it was time for him to get revenge from Nan Qing. They hunted him and even almost killed Luo Susu. If he didn’t teach Qian Longtou a lesson, then he wouldn't be called Ye Mo, and there was no need for him to cultivate.
He was already at 3rd Stage Chi gathering now; not only was his fireball art stronger, he could also use other magic such as invisibility, wind blade, wind surfing and so on. He had once reached Foundation Establishment, so he didn’t even need to practice these magic. He only needed to have the power, and he would be able to release it. He knew that Qian Longtou was watching him near the desert. Perhaps as soon as he showed up, there would be people to take him to Qian Longtou very soon.
