So, way back in the days of playing this game on the official servers, there was a type of event that always got a lot of attention and movement up; that being those little "time limited" special map events. Stuff like, a map where only MVP spawns, or a large map with an elemental/race/size theme, where there’s a far larger amount of mob spawn, in comparison to that of the original map of that monster.
Example: Plant themed map: Mavkas, Wooden Golem, Wood Goblin, Wild Ginseng etc.
(Of course, I used Mavka as more of a proof of concept. A map with a higher concentration of farming mobs could cause a big influx of players on just that area... But it works as an example.)
Due to the temporary nature of an event like this, and the high amount of exp and loot to be gained. I’m sure it would incentivise newer players to form parties for leveling, and also help on the drop of some items. (Provided that certain mobs would be used on such an event, E.G.: Necromancers, MVPs, Banshees etc.)
We already have a really well thought out system for teleporting players and organizing maps. So I believe implementing it as a TP from minigame girl, or even warp girl, could make it work!
Just a thought tho!!!