Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a giant cockroach corpse
(1, 11, D:1)
  a frilled lizard corpse
(7, 7, D:1)
  a stone
(8, -7, D:1)
  17 stones
(8, 2, D:1)
  a +0 robe
(8, 7, D:1)
  a stone
(10, 3, D:1)
  a +0 dagger
  a kobold corpse
(39, 3, D:1)
  a +0 short sword
(41, 5, D:1)
  +0 ice dragon scales
(46, 7, D:1)
  a +0 spear

Level 2 of the Dungeon
(0, 0, D:2)
  15 stones
(9, -8, D:2)
  a +0 short sword
(12, -2, D:2)
  a +0 club
  a hobgoblin corpse
(15, -13, D:2)
  a +0 robe

Level 3 of the Dungeon
(0, 0, D:3)
  a rat corpse