Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 ring mail
(1, 3, D:4)
  a +0 ring mail
(4, 7, D:4)
  a +0 robe
(8, -7, D:4)
  16 sling bullets

Level 5 of the Dungeon
(0, 0, D:5)
  5 gold pieces

Level 6 of the Dungeon
(2, -11, D:6)
  6 gold pieces
(2, 1, D:6)
  a +1 war axe of venom
(4, -9, D:6)
  9 gold pieces
(5, 7, D:6)
  a hound corpse
(11, 9, D:6)
  a +0 morningstar