Location: (Southern) Cursed Shore, see red circle in the pictures below:
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Event: There is small event chain here. The NPC you will need to help is called Tactician Megill. The event chain consists out of the following:
1. Defend her, kill 5 small waves of incoming mobs.
2. Burn the corpses in the area.
3. Escort her back home.
The farm starts at #2. There are around 10 to 15 corpses that need to be burned. Each corpse burned spawns 10+ Maggots. They are quite easily killed and they all drop loot equal to a normal lvl 80+ mob!
Benefits of this event:
+There aren't many people in this particular place (So you don't have to compete with others).
+Lots of mobs to AoE down.
+There are 2 Orichalcum Ore's in the surrounding area.
+As far as I know this event cannot fail. If she dies you can just res her and continue.
Negative's of this event:
-You will probably need 2 people or more to do this comfortably (I have done it 3 times, twice with two people, once with three). Random adds in the area can make it quite challenging to solo.
-I have not figured out how long it takes for this event to reset.
-If you do die solo, you will have to run a long way back (there aren't many people around to res you).
I've have done this event three times. Evrey time I walked out of it with 6+ Rares (I do have 100+ Magic Find).
If there is anything unclear or you have other question, feel free to ask and I'll answer them to the best that I can.