It's a null point, really. With Scrapyard and Dark World Tree has come areal hazards. Scrapyard, you have debris falling at a constant rate all across the map, the largest of which will inflict about 25% of your max HP in damage, along with Dynamo mobs(the very same ones from the Lotus boss fight, but sans nasty effects; just touch damage). Dark World Tree you have Corrupted Imps in the lower area, then Dark Demon Eagle Riders in the second, third and fourth levels up. In both areas, Scrapyard and Dark World Tree, they spawn intermittently and start tracking to the nearest player.
I believe that the very concept of leeching is, beyond a certain level, dead. There is no way to safely leech. There is no such thing as a kishin or HS mule in Scrapyard or Dark World Tree. And given how Nexon Korea seems to love implementing a certain mechanic and then propagating the everloving hell out of it(cough cough %HP attacks) throughout the game world, I feel that this will become the norm for any and all new world areas that are added. There will be some form of hazard in the map specifically designed to shaft anyone who goes AFK or tabs out.
Honestly? Follow the maple guide. Or depending on your class, grind Copper Drakes to around 70-75, then go to Sahel 2 til 90 or whenever. Past that is maple guide for days
As a minor workaround and to cover it under the umbrella of Kanna having movement issues in solo voyages, can you use Shikigami Charm to cover distances?