Since meeting the four great spirits is taken care of, most of the mysteries have been revealed, and the spirit liberation army is pretty much the only antagonist we've been made aware of, seems safe to assume the story is wrapping up. How many chapters would you all wager are left? Admittedly, it's kinda hard to get a feel for how much progress is made per-chapter, especially with how spaced apart updates are, but I'd guesstimate we're in the ballpark of 8-10 more chapters.