Efficiency

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 dagger

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 dagger
(1, 0, D:3)
  a +0 spear
  a +0 animal skin
(2, 2, D:3)
  a +0 club
  a +0 club
  a hobgoblin corpse
  a goblin corpse