Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
  a goblin corpse
(7, 12, D:1)
  a frilled lizard corpse
(14, 4, D:1)
  a +0 club
(16, 5, D:1)
  14 sling bullets
(20, 15, D:1)
  15 stones

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 club
(1, 7, D:2)
  a +0 robe