Some of the ideas here are cool. I do want to caution against the tiamat/kb etc model for a few reasons.

First, all in all these events in XI really weren't that popular. Dynamis, sky, sea etc were much more popular. I say this having done years of HNM- the overall server was not present. Most people that played XI never saw kings till Nyzul.

I think spawn timers have been beat to death, but when I think about them I still cant believe i was that crazy to do that back in the day.

That detailed break down with the mix of openworld claim etc is actually a really good plan it could work with the right amount of things to not cause a bottle neck or crazy claim fest (looking at you early abyssea).