Victory! King Nas the Magnificent -- who looks surprisingly young for an 83-year-old -- is the ruler of the entire world.
As I suspected earlier, Tedndyou (the green/brown in the previous post) was the last survivor, although they don't get credit. After decades of no border changed, the blue/gray maskling force managed to take the last empty province shortly before I conquered their original provinces. They managed to build thorns just below the one usable crossing to Tedndyou, so I had to wait for them to be cleared.
As for Wittoall (red/white), they had two major issues. The first was being totally unable to handle the roving ravensworn; although you see three such units in the upper-right, that's actually five units. I kept rebuilding farms and roads so they'd wander around instead of causing problems.
Wittoall's other problem:
Yes, that's a maximum population of 682 people (and 24 nobles). There's absolutely no way of handling that (a 7/7/7 family member would be the highest-stats officer ever, yet could only handle 630 people), so I removed extra houses ASAP and (since there was a Hungry Maw infestation, I used the Purge ability). Trying to abandon it would cost 154.1 legitimacy (which would be ruinous!), so if this wasn't the very end of the game I'd bring in plenty of soldiers and gradually Purge it down to acceptable populations as my soldiers fought off raiders.
As for the retrospective, the problems from the first post describe it well: Ravensworn/Hungry Maw everywhere, plus a severe province limit. I fully respect your choice to be on break from Bronze Age, but when you return to working on it (whether it's three days from now, three weeks from now, three months from now, or three years from now), I recommend two changes:
(1) Cut back on Ravensworn/Hungry Maw outbreaks. If I was the coder, I'd add a check of (1000/sqrt(territories owned)) out of 1000; that way, instead of someone with X territories having X times as many outbreaks as someone with one territory, they'd only have sqrt(X) times as many.
(2) If you have twenty territories, surely that gives more prestige than having only one! So I'd add a small bonus to monthly legitimacy (say, territories*0.05).
EDIT: Here's the final save. Next game I think I'll play as Shontu or Masklings (or Twelpers!).