Huge thing to take note of this game is there is no trinity force, you are all DPS no healers and such to save your life when you mess up. This is an action MMORPG which relies heavily on a combo system and quick reflexes almost to the point of a fighter game. So if you mess up the only one to blame is well... YOU so it is not for the feint of heart so to speak. Dungeons vary in number of members from 1 player solo dungeons up to 24 main raids. WE WILL NOT have the exhaustion system like many of the Oriental versions of the game have which means your playtime will not be hindered.