It's not really fair, it seems like PLD much like in D&D needs almost every stat, where as a WAR can stack STR and VIT and maybe some dex and call it a day.

STR : for dmg
VIT : for more HP and less damage taken across the board
DEX : for blocking, accuracy, and parry
MND : Healing magic potency and more damage
PIE : for more MP and Magic Evasion