Efficiency

Level 5 of the Dungeon
(4, 10, D:5)
  a +0 dagger
(13, 8, D:5)
  20 stones
(15, -16, D:5)
  15 gold pieces
(32, -2, D:5)
  a +0 robe

Level 6 of the Dungeon
(0, 0, D:6)
  9 gold pieces
(5, 2, D:6)
  a +0 chain mail
(6, 5, D:6)
  a potion of lignification
(9, 10, D:6)
  15 gold pieces
(10, 6, D:6)
  a scroll of identify
(18, 8, D:6)
  a +0 dagger
(20, 11, D:6)
  10 gold pieces