Efficiency

Level 4 of the Dungeon
(11, 1, D:4)
  5 gold pieces
(16, -15, D:4)
  a potion of flight
(27, -2, D:4)
  5 gold pieces

Level 6 of the Dungeon
(0, 0, D:6)
  10 gold pieces
(0, 4, D:6)
  9 gold pieces
(6, 7, D:6)
  29 stones

the Ecumenical Temple