Okay, starting to look at some of the classes and terms.

Basically, Classes like Warriors and Gladiators and there advanced jobs are better for tank oriented roles, and there main job is to divert the enemy attention so that Damage Dealers can start to take the opponent down.

Damage Dealers are usually classes like Pugilists, Black Magi, Summoners, etc. They usually have slightly frail defenses, but excel at dealing a great amount of damage, and can take down opponents who are distracted by the tank rather easily.

Finally, Classes like the Conjurer keep the momentum rolling by healing off damage and providing buffs to the part to gain the upper hand.

Does that newbie summary sound right?