The PSX version doesn't have Dark Knight as far as I know, but this chart will helt you out with the classes: [link] And Calculator is best job, hard as hell to level up and buy skills but is insanely overpowered.
Calculators can broadcast their spells all across the map, and don't consume MP. For example, with one of his skills he will cast any spell he knows on all the characters with the same level (including yours), or he can cast his spells on all the characters that are at the same height. It requires a lot of thinking.
Getting the last summon in the hidden cloud temple, traversing the depths, and actually getting someone to survive and LEARN the summon and beat the boss was a huge chore =_= Those pub missions really were amazingly addicting! I beaten the game 4 times and it always end up feeling slightly different each time. You can barely hold all the characters without sacrificing story event characters or your hard working and some times well named normal ones you got attached to through out the game...
Great pictures with AJ and Twi, I hope this becomes a thing and you do all the summons in how you see can relate to a character in MLP <33 Rainbow Dash Odin/Raiden?