Of all the Job classes in the entire Lowland, none was more expensive than the path of being a mage, a magi, or spell-casters. The class itself was very hard.
It required people to be doubly smarter than those who pursue the class of being Knights, Lancers, Barbarian, or Archers. Magic was a field that demanded great study and was the wisest of all classes. The demand would attract mages of all sorts and kinds. It wasn't unusual for these mages to also dabble in alchemy, herbology, and other fields.
But there was a special privileged for these mages. And that was the amazing benefit when a mage reaches the higher stages of Captains. There was a chance that they could finally wield the ability to bestow class changes.
At the mid-Captain level, Mages are the primary people who are called to create experience points. Families would hunt monsters and other lifeforms or provide precious magical plants, energy stones, or crystals to increase their level.