If you have reached level 30 already in Final Fantasy XI and have completed the ninja flag quest then you can already play the ninja class which is one of the most enjoyable classes to play. To fully maximize you experience though with the ninja, you must get a ffxi ninja guide that will tell you all that you need to know about this special class of warriors. If you want to know the secrets of the ninja then getting a guide is the best thing that you can do. Leveling, equipments and other information can all be found in a guide.
A FFXI Ninja Guide - The Best Way to Play the Ninja
June 30th, 2009 | Reference