What is the best way to lvl 16 to 20 spellcaster in Grand Fantasia

to get to the max lvl i wait till Saturday doubleexp days and go to multiple starting ereas and multple middle lvl ereas[wich are outside the three differant starting erea cities or right outside each starting erea] and do the game like that so i don't have to be very low level and you can check erea's lvl range by clicking them on the map[press M to hotkey it] and checkthe lvl range or right click it if clicking it and it doesnt show somwhere on ur map works