Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  5 gold pieces
(12, 5, D:1)
  a kobold corpse
(17, 9, D:1)
  13 gold pieces

Level 2 of the Dungeon
(0, 0, D:2)
  3 boomerangs
(3, 0, D:2)
  a goblin corpse