Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  a ball python corpse
(1, 11, D:4)
  11 gold pieces
(11, 8, D:4)
  16 bolts

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 robe
(6, 1, D:5)
  a hound corpse
(51, 13, D:5)
  a book of Rime
(58, 1, D:5)
  a hound corpse

Level 6 of the Dungeon
(0, 0, D:6)
  a +0 hand axe
(5, -4, D:6)
  18 gold pieces
(31, 12, D:6)
  11 gold pieces
(33, 13, D:6)
  18 arrows
(34, 7, D:6)
  11 poisoned darts