Not sure if this is really an exploit, it really requires the use of Hitchhikers flying hacks...Ive only tested this on truewow.
Anyway in the mana-tombs instance in the first big room there are Ethereal Sorcerers. They will spawn unlimited Arcane Fiend's that give around 600 exp initially and 7 rep with the consortium. Basically fly above and pull the 4 Ethereal Sorcerers and they will start spawing the Arcane Fiends. Kite them to the ledge in that room that is also the exit from Nexus Prince Shaffar's room. It is to your right when you are in this area. I dont know if its an update to the core but enemies dont walk on air to chase you anymore and if they cant reach you they also cant "evade". It will take some playing and maneuvering on the ledge but you can get them to where they will spawn the Arcane Fiends to one side and the Sorcerers will be on the other side (you will see this when they get there) just keep maneuvering around until this happens. Then just keep using Death and Decay on the Fiends. I setup an Auto Hotkey script to keep casting DnD once i find the sweet spot. I got all the way to 70 from 65 in one day. This is probably unfeasible with mana users. Death knights just have cool downs its just 15 seconds for death and decay and no mana to worry about.
Even if you cant get them in the sweet spot where you can walk away, after a few minutes there will be hundreds of Arcane Fiends. Just spam DnD and clear the whole lot of them and reset the instance and do it again. If you get enough mana voids you will easily get 100k per reset and a few thousand rep.
Since there is no 'evade' on Truewow(maybe others) you can also solo large groups of enemies and bosses like Blackheart the Inciter in The Shadow labyringh very easily, just takes time. Bosses that cast are trickier but can be soloed. You just need to be able to fly out of a Boss's or Enemies casting range. So cast death and decay & death coil continuously until they start casting, fly up real quick, the casting will stop, then fly back until they are back in your casting range, but out of their melee range and rinse and repeat. Ive sucessfully soloed all outland bosses so far, havent gone to Northrend yet but should work similarly. I have several accounts on Truewow and have been using Hitchhikers hacks every day. Sometimes I will get a disconnect, but other than no bans.
Also, here are some safe, treasure chest spawn points you can teleport to on a level 1 character safely without catching aggro.
cut and paste these into thhh_TPlist.ini for Hitchhikers teleport list.
They are all in kalimdore. On truewow these chests respawn about every hour, So good auction house stuff or disenchant.
-----------------------------------------------------------
[Kalimdor: Sandsorrow Watch]
Type:=
MapID:=1
XPos:=-6913.644
YPos:=-3127.94
ZPos:=8.795
Comment:=Destination ajoutée manuellement
[Kalimdor: Magram Village]
Type:=
MapID:=1
XPos:=-1698.081
YPos:=1018.888
ZPos:=89.029
Comment:=Destination ajoutée manuellement
[Kalimdor: Bolgan's Hole]
Type:=
MapID:=1
XPos:=-2372.405
YPos:=2444.761
ZPos:=77.243
Comment:=Destination ajoutée manuellement
[Kalimdor: Magram Village 2]
Type:=
MapID:=1
XPos:=-1761.622
YPos:=913.013
ZPos:=92.493
Comment:=Destination ajoutée manuellement
[Kalimdor: Magram Village 3]
Type:=
MapID:=1
XPos:=-1965.991
YPos:=1265.375
ZPos:=91.59
Comment:=Destination ajoutée manuellement
[Kalimdor: Bael'dun Digsite]
Type:=
MapID:=1
XPos:=-1894.315
YPos:=341.606
ZPos:=106.032
Comment:=Destination ajoutée manuellement
[ashenvale]
Type:=
MapID:=1
XPos:=3274.95
YPos:=408.619
ZPos:=3.479
Comment:=Destination ajoutée manuellement
[Kalimdor: Remtravel's Excavation]
Type:=
MapID:=1
XPos:=4612.274
YPos:=661.638
ZPos:=14.956
Comment:=Destination ajoutée manuellement
[Kalimdor: Cenarion Enclave]
Type:=
MapID:=1
XPos:=10085.846
YPos:=2546.637
ZPos:=1295.042
Comment:=Destination ajoutée manuellement
[Kalimdor: Gelkis Village]
Type:=
MapID:=1
XPos:=-2309.328
YPos:=2627.754
ZPos:=60.249
Comment:=Destination ajoutée manuellement
[Kalimdor: Maraudon]
Type:=
MapID:=1
XPos:=-1184.865
YPos:=2880.49
ZPos:=85.915
Comment:=Destination ajoutée manuellement