Here are the basic classes you will find in the GA. With in each of these cards is the subsequent cards that apply to the Main Class. Training is determined with Guildmasters. So, always use your chain of command for such answers. Seek out the Guildmaster of the class you are interested should further question need to be answered.
The Mage is a Scholar of the Arcane Arts. This individual has chosen to walk the Path of the Wizard. This path is often a lonely road and may take them down roads many fear to tread.
Classes that use the art of staying hidden even at time in plain sight. Spies, hunters, musicians, story tellers, all fall into this category.
The healers of the GA. This mix of classes are the ones that heal, mend, and work with natural forces or direct lines to Gods and Goddess allowing them to aid allies and hinder foes.
The fighters. The masters of armor, shields, and weapons. The forces of destruction in melee combat on the battle field making the solid defense for most realms standing where most others would fall.