This is one point that has never actually been settled in detail, but I feel should be before we can start fleshing out international relations. What shape does the world really take. Off the top of my head I can say that Logos is in the north, Ethos is in the south, the Domains are in between. Somewhere to the east is the 4th wall and the Fantasy Lands beyond that. To the west is an ocean which contains the ever shifting mathemagipelago and Tian.
Where does Hikmah, Atlantis and Saraswati fit in? Is Hikmah beyond Ethos to the south? Does it have a border with the domains, the fantasy lands? Is Saraswati, perhaps, an enclave in Ethos? Is Atlantis the core and cause of the Mathemagipelago anomaly? So, yeah. These are things I'd like to know, but don't.
The second part - the structure of the world itself, I have a few ideas. I think it's been established as canon, that the world is round on the Logos side, flat and finite on the Ethos side, an eternal oceanic expanse to the west and an infinite fractal that recursively folds in on itself in the fantasy lands. How does travel work between these mutually exclusive areas? I'm glad you asked. Each of these beliefs about the world has a center of conviction. If you're, say, in Numinous, every observation from there provides more evidence that the world is round, although the calculations of its exact size differ. In the Domains these views are generally in uneasy balance, making the terrain uncertain and dangerous, which also allows for FTP (faster than plot) travel. In other areas of overlap the world transitions softly from one state to another.
For instance, if you try to sail west from the southern edge of the world, you'll experience the edge of the world slowly but constantly turning away from you. Similarly, if you try to sail west from the far north, you'll notice the seas start to flatten out and far off object fade into mist and not drop behind the horizon.
I can't describe transitions to the east, because I still need to wrap my head around the concept of fractal geography. However, there's a single special case of one way travel. Due north. Since the world is round in the north and it gets more round the more to the north you are, you can actually travel to the southern lands by going around the world. But by doing so you eventually end up being closer to the center of flat world conviction than the round world one. But since all the time the traveller has been moving towards Ethos, he keeps on doing so and eventually arrives there, however, any attempt to travel back the same way will eventually lead to the edge of the world.
I'll post something when I wrap my head around fractals, but for now I'd like some relative positions of the various states so I can start drumming up someting about relations and plothooks.