A really hard challenge. Only dared to play a 0-challenge run.
Had to use somewhere around 25 Potions of Healing, and had to rely heavily on the Ethereal Chains, Stones of Blink and Potions of Invisibility (and the Alchemist's Toolkit and Scrolls of Mystical Energy, too).
(And luckily, thanks to the ability to "spam" dewdrops of the Huntress (with the help of a Wand of Regrowth) and a Ring of Wealth, I could spend so many Potions of Healing for the challenge).
(At least compared to 9-challenges runs, this is still easy).
I had a run with a ring of haste +8 and decided to take the challenge. I forgot that the amulet curse slows you down rendering the ring completely useless.
So thanks for sharing your strategy, I'll see if I can get lucky to give it a try