Tripoli - Omicron Gamma - Water
Leon - Omicron 41 - Artifacts
Beaumont - Texas - Slaves
Casablanca - Omega-47 - Diamonds
Planet Kyushu - Kyushu - Niobium
Leipzig Station - Dresden - Cobalt
Planet Honshu - Honshu - Plutonium
Tripoli - Omicron Gamma - Water
Just started out from Leon and looked what was the base with the highest profit excepting NY and Houston, only made changes to the plan from Mull to Tripoli and Tripoli to Leon:P. The traveling is long but it does give you pretty much profit:P(I Hate docking with and Adv Train) And I don't use Chugoku (totally random generated it was just made for fun in the start but am actually running it now:D)