Personally I would base it upon the development of the Tribe/StateUpdate on 1885 Africa:
View attachment 603013
It is nearly finished, I just need to fix some little things.
Also, a question: Should I mark the borders between all nations? For example, the border between the Senussi and the Wadai, or the Ethiopian-Sudanese one?
As of now, I'm marking the stablished borders (between european colonies, north african states or the Boer ones) with the normal black, while the borders between native states or native-colonial ones are marked with a different tone.