The twotter can only do the Conakry to Siguiri Route R/T and that's pushing it !!you need reserves in case of diversion (Coup d'etat, disabled aircraft, truck on the runway, bad weather, president or his relatives landing, etc... etc...
). The Triangle you are referring to (Accra) is going to require some heavy iron. I would not bet too much on the contact with the "Aviation ministry". In Africa, it means zero, nada. You must be in very good terms with the top Man
AKA Mr. President and things will workout well
as long as he is in office, and you know that can change at any time. Guinea is not very stable at the moment
.You will also have to grease many, many hands...
