Rell

You've an edge with speaking French, maybe You'll be more in touch with the blacks than your Zim PH and more aware of what is going on when tracking.
Having a rifle incidentally shooting game is not a good idea, you better have to bargain it. Roan or waterbucks, common games, aren't pricey.
Derby eland is a sissy, unlike the Cape eland, any wound is stopping him, he has no fight spirit.
A 9.3x74 double rifle will do the trick.
Ethiopia is another story, an expensive hunting country if You're looking for a Mtn Nyala.

good luck