Light or Dark magic.

Initially, I was curious to see in a practical match against another player which is better: a Knight with the ability to cast mass haste and divine power once or twice, but with high defense/attack and a surprise at the end of the battle in the form of the "guardian angel" skill, or a Mage who throws light and darkness (of course, assuming the guild provides something decent), and who can also protect his own units with a mirror?