I plan to paint every box/unit of Cultists in their own colour schemes to show lots of low level cults that have been founded rather than there being one big monolithic movement*. This unit is the Creed Of Perfection who are probably slightly Slaanesh leaning as a cult with their name and purple/pinkish clothes, but I don't want the core few cults to scream a single God dedication.
*although there are a bunch of weird cult units that I might just attach to one of the cults and make a more dominant organisation in the future.
Thanks for reading