Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  20 stones
(2, -3, D:5)
  a +0 rapier

Level 6 of the Dungeon
(0, 0, D:6)
  16 gold pieces
(3, 3, D:6)
  21 bolts

Level 7 of the Dungeon
[Shop] Eriumul's Assorted Antiques
  (Shop contents are unknown)