This only works when lions arch overflow is active.
1. Load up a lot of steel gathering sickles.
2. Go to Lions Arch and work your way through the Troll's End grand chest run. (search utube for guidance.)
3. near the end you will come to a platform with various gatherable plants.
4. STOP, do not carry onto the Grand Chest.
5. Gather the plants.
6. F12 to character select.
7. Select same character.
8. You will probably end up in a different overflow instance. Gather plants.
9. Goto 6
Once the overflow instances have been exploited simply leave your character there and repeat the next day.