There's the sponsored magic master list, there's a lot of good stuff that you can probably use for focused practitioners as well.
Prefixes aren't really needed. Just come up with a theme in regular terms and if you feel the need to do so, you can always try to find the right prefix for it.
The problem I see with a list for this is that it would either be very short and therefore not needed, or it would encompass every little nuance, which would make it pretty bloated. Hell, you can take the dictionary and put -mancy at the end of each word, and you'll have new types of magic. I made a sartoriomancer once (magic done with clothes).