Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  12 gold pieces

Level 5 of the Dungeon
(0, 0, D:5)
  a piece from Xom's chessboard (15/15)
(5, 16, D:5)
  a +0 ring mail
(13, 10, D:5)
  23 sling bullets

Level 6 of the Dungeon
(0, 0, D:6)
  13 stones
(1, 6, D:6)
  a +0 spear