Leveling Tips
Grand Fantasia Gold is necessities, because you should use it to buy equipment and life. You should know some of the most important pieces of gear to look for. Now let us take about.
From 15 to 20, you stick to questing. That is still a superior source of exp at this point. Though yes they will give you an annoying number of kill this boss quests. You do not worry about those do what you can.
After the level 20 mark a big scary place called Prairie cave opens up to you, but you do not want to go there yet. Instead head over to sprites Forest and do some quests out here. This is also where you will find the first repeatable quests that are really worth doing. The repeatable quest for leopard skins is worth doing a couple times until you get the quest for truant roots, which also provides mount flutes. Abuse this quest. The old man who gives you the quest is directly next to leafy truants, meaning you can cut them to pieces and have a very short travel time between collecting and turning in. At 25 you will want to move up to Belmar Plateau. If you did like I told you and got a 2hand weapon this should not take too long. Leafy Truants should die in 2 hits possibly 1 if you already have the full elite guard set.
From 25 to 30, you want to be in Belmar Plateau, or you may want to pay a visit to the southern Island in the J region you will need to go to both for the job change quest for berserker. You might as well get the teleport point early for ease of travel later.
Both areas have repeatable quests which as this point you should have figured out the best way to go about doing. Grinding the repeatable has the added bonus of paying out a good chunk of change at this point too so you will find yourself with a few gold by the time you reach your level 30 job change.