Java Skyblock Help on the quest "Violent ends" post 2023 update

[zapminer98]

Since the update last year, the witches and other mobs don't ammount to the kill count if they're pushed to the void.
Still, without using this previous recommended method, how can I be able to kill - relatively effortlessly - 1,000 witches, since they heal so quickly?

 

[shuiqwe]

Push them down from a 100-meter-high-platform and let them fall to death?