I took the time to transcribe the map a few days ago, and Sharlayan is up there in Dravania, northwest of Ishgard. That being said (and minor spoiler alert, just in case) with the final note of the current story scenario, we may see it sooner than later, I hope.
Also, considering that Ala Mhigo lies east of the Black Shroud, and there's a castrum at the east end of the East Shroud, perhaps we may get to pass through it at some point to reach AM?
