Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  18 gold pieces
(4, 8, D:5)
  a +0 hand axe

Level 7 of the Dungeon
(0, 0, D:7)
  a +6 ring of intelligence
(1, -1, D:7)
  a scroll of amnesia
(1, 0, D:7)
  a scroll of identify
(2, -1, D:7)
  19 arrows