Back in my campaign on the Peninsula of Plenty, I had a coven of witches. These characters were straight up magic users that operated with a pack like mentality and a specific political goal. In order to give them enough power to stand toe to toe with the party physically, they needed to be overpowered. They are 3rd, 5th and 7th level.
Since the party was 3rd level or less, the witches operated with some serious societal restrictions. The Coven of Ash adhered to "The Old Ways", which was unrestricted authoritarian rule. Most of the Empire is not on board with this, including the Emperor.
Their visible presence invokes terror, so they move at night or invisibly. Most of the tactics involve terrorizing people with non-attacks so as to maintain their invisibility. Say, simply surrounding a target, pinching or poking a victim is enough to scare the target into doing what they want. The Coven of Ash are not your typical witches because they're totally unbalanced. They are supporting an authoritarian regime which doesn't even exist anymore. They are basically the Sheriff of Nottingham with magic.
It worked well enough, but now that I got my hands on Timothy S. Brannan's Witch themed books, I can see how witches can be better than mere magic users with quirks. I just have three of the books in the series: The Basic Witch: The Pumpkin Spice Witch Tradition, Daughters of Darkness: The Mara Witch for Basic Era Games and Cult of Diana: The Amazon Witch for Basic Era Games.
To be super honest, I was attracted to the series by the cover art of Cult of Diana and The Mara Witch but I find the one "joke" book, The Pumpkin Spice Witch to be my favorite. It's all the same author, so I don't know if it's the tone or the generic nature of the Basic Witch which appeals to me.
I've also made the mistake of printing all three books and storing them in one binder. I find myself flipping from one to the other. I play this weirdo mashup of B/X and AD&D, so I don't really notice minor differences in purpose, which I am sure is there.
Anyway, I am getting ready to roll up a couple of witches and introduce them into my B2 campaign. The players hopped right past the hermit and a good witch seems to a suitable, player friendly substitute.