In theory WAR should have low defense high firepower, making them good for the off tank role. DRK would of been middle of defense and firepower, with Paladin being slanted into defense rather then offense.

Instead WAR does the best DPS, with the second best defense. Paladin does second best DPS with the best defense. DRK does the worst DPS, with the worst defense only held up by a spammable stoneskin that gives some dps benefit.