[Kalzazz]

I tend to let players define the Hidden Lore skills as they take them, it adds flavor and identifies the player thinks knowing about XYZ is important

I treat Hidden Lore (X) as a super specialty of Occultism, worth a decent chunk better of margin of success

I don't really care how many Hidden Lore exist, as I expect any dedicated 'font of knowledge' type to jump right to Lore! or some other wildcard