@Divine Might
Cover is for Physical DMG. Of course you wouldn't die from a Caster DPS. But your cover target will =_=.
@bbt
It is almost always more effective to continue pounding the cover target, cause lets face it all damage done to the cover target will be transfered over anyways. THERE is no reason to swap. You don't get it do you bbt? Cover damage goes through Hallowed Ground! Thats why I keep telling you to keep track not only on PvP forums but also PvE! God jeez, I'd give you another extras for this. If the PLD covers a target and you sleep the PLD, attacking his cover target will not wake the PLD and the PLD will just die in his sleep.
Cover is usually more detrimental to be used. However it has a good point being that the cover target has the liberty to free cast during that time bar magical attack interrupts.
This forum is way too misinformed. Most of the time it is always used on Healer as even if a DPS die it is sort of a good thing as it contributes to the LB bar, keep everyone alive longer and perhaps your losing team gets their LB earlier than the opposing team and one shots their healer with Melee LB.