This is a very popular solo class, and also valuable in a group.  Magicians are sort of a cross between a fighter and a wizard, because they can fight with their pet elemental and stand back and cast like a wizard.  Thus, while not as strong as a wizard or fighter in their specialty field, magicians are able to to do more than either one alone, and the combination of pet and direct damage spells actually means the Magician can deal more damage over time than either a fighter or a wizard.  They also get some nice buffs and damage shields.  Because a magician basically comes with a built in tank, it is one of the best classes to solo.  In fact, magician is one of the few classes that can continue to solo effectively even at higher levels.  If you plan on playing on your own a lot, but still want to be a damage dealer while in a group, this is a good class for you.

Magician Resources: