My guess is a well played MNK will be top DPS then Dragoon/Summoner/Black Mage will be relatively even. I'm still torn on what exactly to level but currently I'm leaning on the MNK since they will have the shortest GCD in the game from their Greased Lightning stacks. I didn't see a lot of people mention Summoner but as far as AOE goes Summoners and Black Mage will outshine both the melee DPS classes. It looks like Summoners will be the king of AOE since they can spread their dots every 10secs. At the end of the day play which every class you enjoy the most. Don't let armor, looks, or weapons determine what you play just let the gameplay decide.