1. If you have a ring of invisibility, it's trivial. Bring a few healing potions, and just ignore the vast majority of the level.
2. If you don't, it's bordering on impossible. My most recent attempt, with a mage: I hugged the walls and used probability travel to move very quickly. Unfortunately, I still got summoned on eventually. A wyrm summons a few drakes, the drakes summon hordes of drakelings... I managed to get past them (probability travel again), after much difficulty, and made it to the end battle. Killed the boss, eventually (playing a pyromancer, so I can't hurt it all that effectively), dash for the portal as the vanguard of the enormous army behind me catches up and ... "You cannot use the Orb with foes in sight." ARGH.
Anyway, I liked Mount Doom, but I think it's broken now. My suggestions:
1. Disallow invisibility.
1 (alternative). Make the hitpoint cost of invisibility increase exponentially as you draw near to the source. "As you approach Sammath Naur, your ring draws more quickly on your life blood!" Potions could have their duration cut significantly, and the mana requirement of the spell could increase.
2. Stop wyrms/drakes summoning (only within Mount Doom).
3. Make the lava walls impervious to probability travel.
But I'm interested in other people's thoughts
