The level 15 or 20 glove will suffice for a while for any class

In the Monster Carnival, you can use the earth eternal gold to exchange for weapons, usually priced at upwards to 300k mesos. This is a good plan unless you are saving your maple coins, in which you can still get weapons later.

As a mage, master Max MP the earliest. After max MP Recovery. Mages can't make do without magic attacks and MP Recovery rapidly starts to heal 50 MP every 10 seconds while walking or attacking. That means 300 MP every minute.

Quests and Party quests that allow players to make money: Kerning City party quest, Ludibrium maze party quest, Ludibrium pq, The Lost Guard, The Monster Carnival (If you can get the maple coins quick enough)

The level 15 or 20 glove will suffice for a while for any class; in fact, most mid to higher levels (level 50+) use a level 10 work glove (upgraded with weapon Attack)!

However, 100%s won't get you the best possible weapon. However, even when a scroll fails, an upgrade slot is still deducted from the item, so think carefully when scrolling.