Efficiency

Level 5 of the Dungeon
(0, 0, D:5)
  3 large rocks

Level 6 of the Dungeon
(0, 0, D:6)
  a +2 dire flail of holy wrath (still there?)
  a +0 chain mail (still there?)
(1, 3, D:6)
  a gold piece
(1, 4, D:6)
  9 arrows
(12, 3, D:6)
  8 gold pieces