Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 club

Level 6 of the Dungeon
(0, 0, D:6)
  2 potions of might
(3, 1, D:6)
  7 boomerangs
(7, -6, D:6)
  14 gold pieces

Level 7 of the Dungeon
(0, 0, D:7)
  22 stones
(10, -5, D:7)
  a +0 robe