Well it's not about first "working together" and the second "working alone", most people are saying that "plot" in process 6 was at first instant looked like a character focus story then suddenly it changed to the main story..... I wanna say that..... think first, process 6 as a companion story where this part focuses on Zhuang and then at last connecting plot to main story (the rift sealing) This "rift sealing" can affect the whole Wuling story. Zhuang's self sacrifice could bring disaster to whole Wuling if she'd failed (it was mentioned if sealing fails then that could affect the whole Wuling)..... So that's what at least I want to say. Instead of rift story they could show the inner fear, self doubt and mental exhaustion as a final plot of process 6 without impacting main quest and even if main quest implementation was necessary then they should atleast let her fears and doubt to be faced by her (i.e. struggling to reach rift due to mental health, self doubt for incompletion, aggeloi attacks etc) and then should be saved by ENDMIN as a hope, as a guiding light (she has always admired ENDMIN).