i find summoners, black and white mages quite useless. i dont have time for long charge times. bards are useless to me as well. i dont have time for the long charge times of mages and summoners and bards attacks are annoying to calculate and their accuracy is usually about 85% or less but it seems more like 15% with how often they miss.

i see a lot of badmouthing for samurai's. they can be useful. when you have the charjarden or whatever its called your attack is well above average. and if you use there iadoe abilities masamune can regen and haste your team which is quite useful. kikichimoji can hit for some good distance. and using the chrajarden iado was shockingly powerful kinda cool looking too. oh i realize i probably spelled a lot of things wrong in there but you should be able to get the hint.

i find calculators/mathmeticians useful too in when just about everything else is mastered. but if your more of a close range type of fighter yeah they suck.