Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 rapier
(3, -5, D:5)
  a potion of flight

Level 6 of the Dungeon
(0, 0, D:6)
  a book of Minor Magic
(3, 3, D:6)
  a book of Vapours
(9, 2, D:6)
  11 gold pieces
(20, 10, D:6)
  a +0 arbalest

Level 7 of the Dungeon
(0, 0, D:7)
  a +0 flail