Alter Aeon Online Help

Keywords are:  'classes multiclassing multiclassed primary secondary tertiary'

The available classes are mage, cleric, thief, warrior, necromancer, and
druid.  See the help pages for each of the classes specializations.

Mage:         Spells, most offensive and utility
Cleric:       Spells, most protective and healing
Thief:        Backstab, combat harassment, lock picking, steal
Warrior:      Parry, shield block, fighting skills
Necromancer:  Demon summoning, raising undead, blood skills
Druid:        Weather control, earth spells, herbs, runes

Multiclassing is not just allowed, but highly recommended!  The entire game
is built around the idea of characters having levels in several classes,
so don't try to just stick with one.  See 'help advice' for more info.

When leveling, you can level whatever class you like, whenever you like.
The order you gain your levels or train your stats doesn't matter.
(Providing of course, that you have the experience to do so.)

Your highest level class is said to your primary class, the next highest
your secondary, the third highest your tertiary, and so on.  If you
the follow the advice of levelling your cheapest class, they will end up
being about five levels apart from one another until you reach maximum
level.