Humbler

His position was humbler and his field more obscure than those of the quacks with capital and an organized system of advertising.

[…] the unravellers of cunning, the investigators of artifice, the humblers of pride, and the scourgers of oppression […]

Mistress Desiree removed the ball crusher and then selected the humbler. Telling him to bend over so she could apply this sweet looking device.