Why does no one use five paladins?

[Vicker]

To combat the melee thing i use on my dk group. I send in main with rest following then all have g as secondary forward button. So once main is on target i hit g to get them all on top then start beating the crap out of something. Seems more work then its worth but once u get use to that your fine.

Optimally, melee dps should be behind the target. Attacks made from the front have a chance to be blocked or parried. This reduces the dps output. Also, when the target parries it gets a boost to melee attack speed, which means that the tank takes more damage. Having five guys meleeing from the front means that the target is almost always going to have that bonus to attack speed.