PTR.
Paladin
Level 70
500 Spell Damage.

This is just a showcase of PvE grinding on a paladin in the current test realm.

I selected 9 lvl 68 warrior class mobs to do my grinding. Each mob has 6,400 health. From the time I actual start to melee/dps, to the time the last mob falls, 43 seconds pass. For those who care, that is 1340DPS solo and self buffed.

http://www.wowhead.com/?npc=21519

I make 200gold an hour this way consistently. You will notice I did not need to heal, and I ended with half mana. It takes 2 HL (5 seconds) to get to full health. Although I am lazy and do that, I could simply heal once, and eat and drink at the same time. It takes 15 seconds of drinking/eating to have 100% Mana and health again. .