BsK? Dang, I'm gone for a month and I miss so much info. . .
I don't know about this BsK thing, but I think we know enough about the game to construct a pretty accurate tech tree. If you like I can draw one for you. We still do have that screenshot of Set's tech tree.
"It may come as a shock to you . . . You can have fun and be serious all at the same time."