dowan wrote:I can't imagine this is in any way doable. A ranged monster could always wander into view and attack on the same turn, then it's just a dice roll whether you take damage or not.
Better be stealthy, then. Being a DD helps since their damage reduction reduces the chance that thrown stones will damage you. DD damage shaving also means bats are harmless, and lets you take one level of poison without taking damage (happened to me twice in the game I'm playing now).
The first part of the challenge would be to make it to lair without taking damage, with some attack capable of killing black mambas before they can hit you. Then there's a lot of easier XP since most things in lair are not ranged.
Some options for attacks that can kill black mambas without taking damage: summonings, high power fireball, a wall of zombies with kiku, confusion + weaker ranged attack.
Kiku is maybe the best god because you're guaranteed a necronomicon (if you can make it back to an altar, that is!) Chei would be good for casting high level spells sooner but requires you to get lucky and find a necronomicon. Possibly Fedhas would be good, since you could set up a wall of oklobs and just wait in a lair level for them to kill things. The danger there would be invisible OOD spawns.
The next part of the challenge would be to scum lair for enough XP for ddoor.
Then it's on to the rest of the game. Ashenzari or antennae would help out since you could detect monsters and cast ddoor before they enter LOS.