This could be important for pallys, who haven't got an ability to pull flying mobs. The following tri.. exploit isn't useful if:
-you can cast Holy Schock on the mob
-you can cast Repentance on the mob
-you can cast Avenger's Shield on the mob
-you can cast Judgement on the mob (range)
-you can throw dynamite on the mob xD
So, let's start..
You only have to farm (at Arathi)/buy Thundering-, Burning- or Cresting Charms.
Those little items have a ~30 yard range and they aren't doing any damage. BUT they cause the mob to attack you.
I'm not sure, if this is an exploit, but I think that it isn't supposed to work on lvl ~70 mobs (or on any other mob than the special Exile-Mobs) =)