Blackfeather Roost is another option. At 66 a small group can easily handle the first few levels (the zone is set up in tiered island sort of like the old plane of sky, but the key-quest is permanent so you don't have to carry keys around).
BR is a hotzone at the moment.
The harpies have some special effects (such as a knockdown that you have to stand up to escape from).
The named hit hard (i.e., cunning mountain puma) but the regular mobs aren't hard.
My necro spent an age in this zone 65-70 because it was so good for AAxp and vendor drops. This was before it was hotzoned for even better xp.
Also, make sure you rank up Combat Stability and Combat Agility AA... they make a huge difference in the earlier ranks.