Efficiency

Level 2 of the Dungeon
(0, 0, D:2)
  11 gold pieces
(2, 6, D:2)
  15 arrows
(7, 29, D:2)
  a +0 scale mail
(14, 26, D:2)
  a +0 whip

Level 3 of the Dungeon
(2, -3, D:3)
  15 gold pieces
(2, 0, D:3)
  a scroll of teleportation
(35, -4, D:3)
  9 gold pieces
(38, -20, D:3)
  16 arrows
(43, 1, D:3)
  a +0 flail
  a +0 ring mail
(44, 2, D:3)
  a frilled lizard corpse (skeletalised by now)
(44, 3, D:3)
  a poisoned dart
(52, 4, D:3)
  an orc corpse
(53, 14, D:3)
  a leopard gecko corpse (skeletalised by now)
(54, 9, D:3)
  a +0 mace
  a +0 hand axe
  an orc corpse

Level 4 of the Dungeon
(0, 0, D:4)
  2 throwing nets {!f}
(10, -16, D:4)
  a +0 hunting sling
(10, -12, D:4)
  a quokka corpse
(14, -10, D:4)
  a +0 chain mail