Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  23 stones
(4, 8, D:5)
  a scroll of silence
(11, -7, D:5)
  15 arrows
(21, -1, D:5)
  8 gold pieces

Level 6 of the Dungeon
(9, -1, D:6)
  22 stones
(19, 1, D:6)
  15 stones
(22, -8, D:6)
  6 gold pieces

Level 7 of the Dungeon
(0, 0, D:7)
  11 poisoned darts