[Astromancer]

The main thing we know about Roma magic is that it isn't like Western Occult traditions. The Roma have traditionally used other people's superstitions to shield themselves, but most of what they actually do we don't know.

It should be remembered that there are peoples out there that are remarkably free of superstitions. Just because a group of people is poor, lacks conventional education, and are seen as "primitive" by others, doesn't mean they practice witchcraft.

The best bet is to remember the Roma originated in India. They were tribes of wandering smiths. Look at Indian Tribal magic and extrapolate from there.