Ok i am gonne try to write a little bit about it
There are always 16 players (2 groups of 8). Every group got 2 Whitemage, 1 Paladin, 1 Warrior, 1 Bard 1 Blackmage, 1 Monk, 1 Dragoon.
You can play everyclass whith keyboard or via gamepad. You have 15 minutes time at the beginning to change settings like camera....
A good advice is, that you can also use your skillpoint (don't now if ist right so say skillpoint in english).
Then the fight starts you have 15 minutes time to kill Titan. If you all die you can start again but the times goes on so if you die and have only 5 minutes left
you start the new fight at 5 minutes.