Efficiency

Level 4 of the Dungeon
[Shop] Uler's General Store
  a +0 hunting sling (19 gold)
  a +0 robe (9 gold)
  a scroll of noise (13 gold)
  20 stones (26 gold)
  a phantom mirror (390 gold)
  a +0 hand axe (39 gold)
  7 poisoned darts (36 gold)
(0, 0, D:4)
  a +2 whip of electrocution

Level 5 of the Dungeon
(0, 0, D:5)
  an iguana corpse
(2, 1, D:5)
  a +0 club