Ji Ning's retainer had just become a Chaos Immortal, but he himself had yet to make a breakthrough! Still, Ning was fairly happy. At least he got a powerful assistant out of this event! However, Su Youji was a new Chaos Immortal who didn't even have a suitable Dao weapon to use. Thus, she was actually weaker than most World-level experts; she could at most be considered to have reached the lowest benchmark of that level.
New Chaos Immortals with no suitable treasures and who hadn't had the chance to solidify their powers were actually quite weak. Usually, they'd find a private location and spend a few thousand years in solitary cultivation. Only when they increased in power to become comparable to normal World-level experts would they emerge from seclusion.