The middle class between melee and magic are the FFXI Red mage. They are a jack of all trades classes that can cast both black and white magic but are limited to the power of those magics. On the melee side, they are able to weild weapons to defend themselves and use more armor compared to the other magic classes. Besides using both melee and magic abilities, their also have their own unique abilities and spells.
Here is an example of FFXI Red Mage Final Fantasy XI Red Mages Information submitted by our community in the past. (Note this information is not valid and should be considered nerfed)
I saw another thread about it but i dont know if that guy got it right... what you do is, call out your npc, do whatever with him, go farm, lvl etc... then drop the pearl`.. go back to jeuno or wherever you find a rendezevious point, and talk to your npc, there will be an option to get a new pearl, choose it