The Scum Is Deserving
Everyone was surprised, but they understood it immediately after. As Jing De said, there are only two from the Zunjingde Sect, one from the Huakai Sect, one from the Huli Sect, one from the Guhe Sect, and one rogue cultivator. If they would separate, it is unknown if the demons they will encounter later, especially accidentally, will overpower them. Even if the six of them would join forces, their strength still isn't absolute.
They don't dare gamble. Thus, they chose to ally with the Xinfaxian Sect and Youxiwang Sect. Wu Lian's strength is undeniable, as well as Chen Wu's although Chen Wu was often overlooked since he focuses more on his family's welfare than the cultivation world. Although the twins Chen Su and Chen Yu are young, they don't slack with their training, either. Thus, they should be fairly strong.