@Tanc49 : Didn't mean to ignore you, had been busy and never got a chance to reply properly earlier. Really sorry about that.Heya, quick word to say it's a fun thread and I like your replies. Now I'm gonna dispute this.
I don't see why such an empire would have colonies in Western Africa or in the Cape. ITTL, trade routes would probably go directly to Morocco or Egypt. The need to short circuit Muslims was the drive to establish comptoirs OTL. No need for that here, it takes a lot of resources to establish and maintain yourself in those regions.
I'll wait to see the map but such a ERE would probably get a hold of the Western Indian Ocean trade routes. So probably Sofala/Kilwa, the equivalent of Port Dauphin. Maybe Gujarat? It would make sense.
Also a Byzantine Melakka? OTL the Ottomans established big trade routes with Indonesia in the XVIth century
The African colonies date from much later, and were not done to control Eastern trade. More to acquire natural resources and dump prisoners at one phase in history. The ERE will also have a lot of presence in Indian Ocean trade routes (Melakka is a good possibility, as is the area around OTL Mumbai or some spot in Kerala or Sri Lanka).