So here's what's fun about Ala Mhigo. Since the beginning of 2.0, you can see it's borders but no one has ever really talked about it, probably cause it's out of the way. If you run to the farthest Northeast corner of East Shroud's map (Goldleaf Dais), look eastward through the trees. This is the only location this wall exists, but it's distinctive enough. If you're lucky and have lightning weather, you can see it even better since the weather effect is always misty.

Originally I thought it was just a Castrum and dismissed it, but the map has a bit of land that extends further than Goldleaf just south and there's no wall at all to connect to the Castrum. There's also a path blocked with a few fallen trees up in Goldleaf that could easily become a zone connection.