I find these interesting simply because this combination seems different than a lot of them. As to the missionary strength comments, I don't see that playing in much. They're a Sunni nation in a currently Sunni region with the alternative being Animist. Animist is fairly easy to convert for a Sunni anyway. I wouldn't expect a Kanem Bornu game to be very dependent on religious conversion. However, it does open up the fun alternative of targeting Europe (and the reduced unrest makes it tempting).