Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  8 boomerangs
(11, 9, D:1)
  6 gold pieces
(12, 4, D:1)
  a +0 whip
(14, -6, D:1)
  24 stones
(20, -6, D:1)
  a +0 whip
  (unseen)
(23, -11, D:1)
  10 arrows

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 robe
(3, 3, D:2)
  a +0 war axe
(9, 5, D:2)
  8 gold pieces
(10, 3, D:2)
  15 stones
(12, 6, D:2)
  16 arrows
(13, 2, D:2)
  a +0 scimitar

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club
(1, 0, D:3)
  a +0 chain mail
(2, -30, D:3)
  a quokka corpse (skeletalised by now)
(2, 9, D:3)
  a +0 club
(3, -18, D:3)
  a +0 short sword
(8, 6, D:3)
  a +0 club
(18, 1, D:3)
  a +0 spear
(19, 4, D:3)
  a bat corpse (skeletalised by now)

Level 4 of the Dungeon
(0, 0, D:4)
  13 stones
  6 gold pieces
(5, 6, D:4)
  6 boomerangs
(15, -15, D:4)
  a +0 ring mail
(15, 3, D:4)
  a +0 scale mail
(21, 2, D:4)
  a +0 ring mail
(22, -2, D:4)
  10 gold pieces
(25, 11, D:4)
  11 gold pieces
(27, 0, D:4)
  a +0 hand axe
(28, -11, D:4)
  31 stones