I suggest a resource and luxury event.
It would be a 5-day event.
For the first 3 days,
remove or lower the defenses in level 7, 8, 9, and 10 areas. Set the luxury percentage in these areas to 1 percent and double the resource yields.
And for the last 2 days of the event, place important materials to exchange for excess necklaces.
Note: This event is open to all players on the server, regardless of their rank.