I know I saw someone bring this up somewhere, but I cannot find the post for it. Sacred Fist using the Radiant Servant ability for Divine Cleansing does not get any charges. And I think I know why this is occurring, but a fix for it might be somewhat complex.
The problem:
Sacred Fist gets a Cleric Tree
Sacred Fist gets Turn Abilities in that tree
Sacred Fist, like regular Paladin, does not get Turn Undead until level 4
Cleric gets Turn undead at level 1.
So then the question that complicates things for the developers, who may want to balance against this.
Should Sacred Fist follow the Swim Cleric Path and get Turn undead at level 1, which really fixes this altogether; albeit, at the risk of Unleashing a Hoard of Undead Annihilating Ninjas from a Kraken Airship parked just off Korthos.
Or follow the Paladin Path and have to wait until level 4 to get it, but have broken abilities in Radiant Servant until they obtain 4 levels in Sacred Fist.