Efficiency

Level 5 of the Dungeon
(5, -10, D:5)
  an adder corpse
(8, -29, D:5)
  a +0 flail
(9, -5, D:5)
  a +0 robe

Level 6 of the Dungeon
(0, 0, D:6)
  31 stones

the Ecumenical Temple