It was only on normal, I was a level 3 ranger, wearing light armor.
I went into it with around 20/50 HP, about 80 arrows, five health potions, and a curative cloak (depleted). I was too stubborn to leave and restock, cause I would lose an exp bonus >.>
Even with the rest shrines, I ran most of the dungeon well under half of my health bar.
I didn't just get the main prisoner out either, I got all the prisoners out, and beat Bloodletter, and survived a Dungeon Alert: Green.
Got Arlos out with only 3 HP left, my cloak depleted again, no potions, and about 10 arrows (thank goodness for Crates and Barrels). I sat and stared at the stabbing spikes in front of the entrance for like five minutes, hoping the cloak would get charged, until I finally dared the spikes. Oh, and every Kobold in the place was dead.
My first big test as a new player, I would say it went well.