Special classes in Final Fantasy Tactics : The War of The Lions

To get the job Arithmetician :

Level 5 White Mage , level 5 Black Mage , level 4 Mystic and level 4 Time Mage.

To get the job Archer

Level 2 Squire

To get the job Bard :

Level 5 Summoner and level 5 Orator ( Male only )