I'm level 29 and I just now noticed this

[Naphthalene]

I can’t find the original suggestion, so I will just quote myself:

Vacation Mode is Not Your Friend

I don’t remember where I saw the suggestion, but you can also do WK in super sudden death hardcore mode. Every time you miss an item, you have to reset to level 1. (You have also the luckwarm hard mode: every time you miss an item, you reset your current level.)