50% luck, 20% skill, 15% concentrated power of will....
Was trying out if double soul devour necklaces would lower damage enough to the point where you can get a lot of dodges in, since this enemy can not be blinded or stunned. Turns out it's a complete waste to have those on, which means i could have put on literally any other accessories, like ballistic shields(if i had any), small thing amulets for more dodge/defense instead of wasting two slots.
It's basically all luck. It is mandatory to have either a Salmonsnake rune, or Arm guards so you don't get rng game over'd within a turn or two.
The "strat" is to hope you don't get killed within any one turn, and land a few damage over time effects. Honestly anything works. I didn't have access to nettles since i was too lazy to crawl all the way over back to the train again.
A murky vial or gasoline canister might be just enough to land a burn and stall to the end with healing spells or items. Ideally you use the crafted poison hemlock or whatever it's called to get a 2 turn victory or something.