Blacksmith
Weapons were important to everyone, be it commoner, knight, or mage. Of course, the choices for commoners and knights were very limited compared to what mages could use, but what they all had in common was that they fought with some sort of weapon.
Mages made their choices based on what class they had.
Amplifiers preferred any weapon for close combat, be it huge swords weighing several dozen pounds or long spears. Some used bulky bows and crossbows, but these were a minority.
Commoners were not prepared to fight in close combat like Amplifiers, so their choice fell on various staffs, wands, or grimoires. It was important for them to stay at mid-range and use their mana to apply maximum firepower.