Here are some other tricks - not sure if they're applicable for rogue/hack/moria, but I'm sure you might've used/heard of them:
Use a cursed scroll of genocide. Take off all your armour and weapons.
Read the scroll, genocide all nurses.
Nurses appear, let them hit you... max hit points keep going up.

Kill a cockatrice. Wear gloves. Wield the corpse. Anything you hit gets petrified. Saves time.

Make sure you've a helmet on - otherwise, if you drop into a pit, that's it.
Play a neutral character, get the Vorpal Blade object. One hit lops the head of a mob off.
Play a lawful character, get a long sword. At about character level 7 or 8, dip the sword in a fountain. If you're lucky, the lady of the lake reaches out, grabs the sword, and turns it into Excalibur.
Man, this game is just awesome...