Sorcerer:
Names: White Mage->Black Mage->Red Mage->Blue Mage->Deadly Mage
Druid:
Names: Summoner->Beastmaster->Geomancer->Necromancer->Deadly Summoner
Paladin:
Names: Ranger->Cannoner->Dragoon->Oracle->Deadly Ranger
Knight:
Names: Knight->Mystic Knight->Berserker->Gladiator->Deadly Knight
Assassin:
Names: Assassin->Mercenary
All unique and strong!
Other not available:
Names: Staff, Freelancer, Enigmatic Soldier