hmm just grind past mt. fibulendo into the caves and ruins..or if you want you can grind in the haezwood cemetery.
try making the 1st job lvl20+ then shift to the next one.. if i were you i would make a monk with pure vit stats and have a thief using bows with high dex and a priest pure int stats with a sub job mage ... place the the monk in the 1 row left or right grid and the other character lets say a fighter on the opposite side of the monk,then put the thief& priest in the bottom row.. thief in the left and priest in the right grid.. this will make the party stats change.. it will have a +25mag atk, +10 weapon atk and -10 damage... this way it will make grinding a bit easy for to kill hostaes..
im still using this kind of strategy until now..
these is my party right now:
lvl36 knight / 43 fig / 18 thief
lvl40 fighter / 30 monk/30 thie
lvl32 mage /35 enchanter / 30 priest
lvl35 thief / 30 fig / 33 monk
the lvl 40 fighter & lvl36 knight already has 99 str
mage has already maxed out its int stats