could

could you be albe to complete da game just wid mastering monk white mage knight and black mage just wondering

[thatguy]

Yes, it's possible, but not recommended.
Later in the game you will get better jobs, so if you like your current party keep them, but if you see a job you like try it.
I suggest mastering lots of jobs so that when you find mime you can put on your favorite abilities.
(I tried every job. My favorites were white mage, black mage, summoner, monk, sorceror, ninja, lancer, mime, blue mage, and time mage. Theif may also come in handy but its most useful ability, find is one of the first abilities a thiefs learn.)