All WW Mage books are in play. If you're not sure about something, ask me. If I don't have the book, I might ask what you're talking about, such as your Legacy, but generally until it has mechanical impact, it's not a grand concern. And I do have a long list of books.
EDIT: Also, to those PMing: Put whatever you want on here. Whatever you feel is enough to relate your character to me. If you think three sentences will get the point across, write that much. If you write six pages, gonna tell you now, I tl;dr after about four-six paragraphs a section. I'll read it all eventually, but during selection process, time is critical, and I'm working 60 hours a week right now.