Was the first of the series. Sure it would been nice if they gave them each one unique class, but this is a very early Srpg. Due to time constraints memory, or budget I could see those being left simply as 3 other commanders with identical routes. I mean Garret and Sabra have all same paths as them too, just they happen have 2 extra classes.
It's easy look back and identify weak spots in the game(the wizard/cleric class tree is odd, Serpent knight needed another class to follow it such as dragon knight, and some other water class with higher stats as it and bishop were like these 2.5 classes while everyone else advanced to 3..), but it's still a great game.
Never made it as a wise man, couldnt cut it as a poor man stealing. -Nickelback