Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  a wand of flame (19)
(6, 5, D:4)
  6 curare-tipped darts

Level 5 of the Dungeon
(0, 0, D:5)
  an arrow
(3, -4, D:5)
  a +0 hunting sling
(3, 1, D:5)
  6 gold pieces