Dubai-Kinshasa-Brazzavile-Kinshasa-Dubai and Dubai-Kigali-Bujumbura-Kigali-Dubai seem like options to me. I also agree with Maputo. What about Mombasa? Kilimanjaro? or Mombasa/Kilimanjaro tag? Windhoek, Gaborone, Antananarivo, Libreville, Lome, Juba... There's so many!
Obviously Freetown, Monrovia, Bamako etc. Are all off limits at the minute.