There's a spot in Dragonblight where you can AoE grind melee mobs very fast.
That zone is Galakrond's Rest (60.0;32.0), northwest of Wyrmrest Temple.
The mobs you are going to kill are Wastes Digger:
Level: 67-73
Health: 9,610 - 9,940hp
Wealth: 15s
Drops: Frostweave Cloth, Potions and Grey vendor trash.
Damage: 200 - 300hp/hit
These mobs spawn in less than a minute, making them very desirable for aoe grinding. They also stand close to each other and they don't move while out of combat, making the pulls easier.
There are several spots with these mobs, but you won't need more than one, since the mobs respawn as soon as you finish resting. The one i usually go for is shown on the picture above, on 60;32, because the mobs are closer than on the other spots.
There are 11 of them spawned at a time here, and you should be able to kill them all in 1-2 pulls. Each mob earned me 800-900 xp at level 74, making an average of 70k xp/h, while looting.
Also, every 10 minutes (3-4 pulls), i was getting one stack of Frostweave Cloth, ~5g in coin drops and a few grays.






