Actually, the key is to determine what kind of role one envisions for themselves. Initially, Xiao Buli thought that if he could learn spells like the Invisibility Technique or Earth Escape Skills, he could then join the Vermilion Bird Group. Therefore, his skill development naturally leaned toward subterfuge and life-saving. However, among the spells he was currently able to exchange, there were no such skills available. Even the most basic Shadow Escape Skills required a Taoist Heart LV2 to learn, which forced Xiao Buli to reconsider his positioning.
According to the clues he gathered from Li Jian, Wu Tao, and others, the Mana-based Classes were the most scarce in this game, whether it was magic system DPS or support healers; both were extremely rare. In contrast, the tank roles that are usually very popular in other games were not in short supply, and physical DPS were ubiquitous.