This post brings together my current thoughts on the overall scenario discussed on mohai.conlang.org.
There needs to be a plausible number of peoples and languages in the study area. I mostly have this now. The site looks at the north coast of the continent of Aheku and focuses on the island of Mohai. The timeline post notes the existence of Etsuri and Pekau, mainland states speaking languages from the same Dahu language family as Lemohai. Other unnamed Dahu states are hinted at.
The existence of Heiko is well-documented. This is Mohai’s main rival for power within its culture sphere. Heitak speaks a language from the Kemba family and the existence of other Kemba language states is hinted at.