The Capo
godless Heathen
I'm not sure what you have in mind for the body, but as I was looking at it, I thought that perhaps a beadless Asoka would blend in well. The neckline looks similar to the scarf that Askia's already wearing, the style of the collar looks like it could be related to the later Mansa Musa design, and the simplicity of the robe would help communicate the idea that this is an earlier and slightly less-prosperous leader of the Mali.
That's hilarious because I am literally working on Asoka's robe right now. I am going to use that, throw those things on the shoulders of Mansa Musa over it (but they'll be recolored and "bigger" and then give him Saladin's sleeves, but white rather than grey.
I rarely base my LHs on specific pictures because it limits creativity and things that may make it look better in the end but I am loosely basing it on this image;

EDIT: If you are confused as to why Anheuser-Busch has a copyright on that image, or why an American beer company has a painting of him.... join the club, I'm also confused.