Alright Gladitors wear heavy armor but I was reading discription on duelist: Regarded as the most powerful swordsmen in one-on-one combat, Duelists prefer dual swords as their weapon of choice, and they overcome the enemy with storm-like swiftness. They do not wear heavy armor, as they have inherited the Gladiator mentality of regarding their attack as their best defense. So now we wear light armor so the attacks get stronger but have low defense now?
The descriptions of the classes aren't written by people who actually play the game. Never follow the descriptions, they are ment for potential customers, not people already playing.