Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  a book of Blood
(3, 1, D:4)
  10 gold pieces

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 scale mail
(1, 23, D:5)
  30 arrows
(36, 7, D:5)
  a +0 flail

Level 6 of the Dungeon
(0, 0, D:6)
  a +0 pair of boots
(6, -12, D:6)
  a +0 dagger
(7, 21, D:6)
  a +0 pair of gloves
(11, 39, D:6)
  18 gold pieces
(15, 35, D:6)
  12 gold pieces
(16, 28, D:6)
  a +0 hand axe
(17, 29, D:6)
  a +0 dagger
(18, 22, D:6)
  a +0 spear

Level 7 of the Dungeon
(0, 0, D:7)
  6 poisoned darts
(3, -9, D:7)
  21 arrows
(29, -9, D:7)
  9 stones
(29, -5, D:7)
  20 stones