In Zangarmarsh there are quite a few quests that involve killing naga this is where this exploit is usefull the quest [Only registered and activated users can see links. ] will give you an item called Ironvine Seeds while you have the quest these are used to disable the naga pumps in Zanga.
The Exploit is that these can be used over and over again on the same pump basicaly leting you choose when to spawn the Mob [Only registered and activated users can see links. ]
These drop of [Only registered and activated users can see links. ] needed for another quest, they also have a high drop rate of plant parts, you can also kill them for there [Only registered and activated users can see links. ] that only drop from this type of mob.
The Cords for the pumps are:-
Unbrafen Lake - (70,80)
Marshlight Lake - (25,42)
Serpent Lake - (62,40)
The Lagoon - (63,64)