Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 spear
(27, 2, D:1)
  24 bolts

Level 2 of the Dungeon
[Shop] Eghe's Antique Armour Boutique
  a +0 ring mail (112 gold)
  a +0 pair of boots (126 gold)
  a +0 scale mail (112 gold)
  a +3 ring mail of poison resistance (644 gold)
  a +0 kite shield (126 gold)
  a +0 ring mail (112 gold)
  a +0 ring mail (112 gold)
  a +2 plate armour of cold resistance (1120 gold)
(0, 0, D:2)
  a jackal corpse
(3, 6, D:2)
  a +0 robe

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 leather armour
(3, 2, D:3)
  a rat corpse
(11, 6, D:3)
  a +0 leather armour
(14, 2, D:3)
  a dart slug corpse