我完成这个任务了。
社区指南原文：Killing 66,600 enemies requires having most blessings, traits, specific artifacts, and gear, without mentioning a bit of luck as you need to get the desired traits and uncommon variants of gear as soon as possible within the run. For that reason, I recommend leaving these kind of achievements for last.
You will need a high DPS hero such as Exterminator, Archer, Sorceress, Sage, Landsknecht, etc; and screen clearing abilities suck has Kugelblitz, Morning Star, Ringblades, etc.
There's really no 1 way to get this but I personally got it with the following setup:
Build: Full-Crit
Hero: Archer (Arrow)
Abilities: Phantom Needles/Ringblades/Morning Star/Kugelblitz
I focused on maximizing DMG/MS with Archer and DMG/Crit/Attack Speed/Area for the abilities.
Lastly, at the time, For artifacts I used the Hastening Sands and Killing Gaze. For gear, used Wind Crown, Blood Catcher, Wooden/Cooper Rings, Blood-Soaked Shirt, Hunting Gloves, Running Shoes.