Infinite money farming[]
Having Head Of The Keeper & shooting at the front side of a Knight Monster will still yield a chance to drop money, even though the monster is not damaged, thus making it possible to farm coins by repeatedly shooting at the same target. I am not sure if this is intended or not, as it doesn't work when shooting at a Host monster
Lots of sacks[]
Sack Head with Head of the Keeper will make enemies drop lots of sacks when hit. This thing is broken as hell, as you can get 99 of everything real quick