@Cornwallis
Not an expert, but from my experience slow movers are, well, too slow to get to the Middle East from French West Africa.
Additionally, I often find that if the Allies need to defend substantially in the Middle East, they’ve effectively lost as Germany probably already took Moscow and Japan likely took India. If either place is the ultimate destination it’ll take even longer. There are 10 territories seperating French West Africa to either of those destinations in the most direct route (best case scenario assuming the Allies even control all those territories).
It’s a much better investment in most cases to launch amphibious assaults in Europe or even North Africa than trying to buff up the Middle East via French West Africa. As I’ve said previously, only transport units there if absolutely necessary (usually if Germany and Italy are still too menacing in the Atlantic and the UK activated Brazil early and that’s the only spot they can safely transport units to the mainland).