Where to spoil Halberd Edge

3 monsters drop Halberd Edge on spoil, the lowest level is 68. The chance already assumes solo spoiling with no level-difference penalty: put your own level into the calculator.

MobLvlSpoilsWhere
Bloody Keeper Bloody Keeper 68 Halberd Edge · chance 0.35% · 1 pcs Antharas' Lair
Conjurer Bat Conjurer Bat 69 Halberd Edge · chance 0.13% · 1 pcs Aden Territory, Blazing Swamp, Field of Massacre
Platinum Guardian Shaman Platinum Guardian Shaman 71 Halberd Edge · chance 0.35% · 1 pcs Tower of Insolence: Floor 9, Tower of Insolence: Floor 8

What it pays and what is better to kill at your level — in the spot finder.