They all do the same damage honestly.
Pugilists punch makes it seem more interesting, but quite frankly, with the miss/evade rate, it's really not that much dmg..
Marauder, Gladiator, Lancer? All the same damage with different weapons.. Tell me, how is a sword on par with a god **** great axe or lance? The purpose of 2H weapons is longer delay with higher base damage.. In this game, not so much.
Conjurer, Thaumaturge: When solo, spam spirit dart and the occasional cure to keep yourself topped off.. Throw Spikes and Stoneskin in when you get it and you've got the point.
As it stands, no class has any benefit from the other, they all do the same damage with different spell animations.
Job Levels: 75RDM, 75BRD, 75BLM, 72PLD, 61NIN, 52THF, 44WHM, 60SCH, 47BST, 52SAM 37WAR, 37SMN, 37BLU, 37DRK