Thank you for your responses. It is good that you both agree on BS.
Many say that Shield is best for secondary, but I feel that it looks wrong for a Stalker.
I still need to decide on SR and WP.
The character background is that she was a magician's assistant. Her parents (a magician and assistant) were killed by the mob because they refused to use their illusion equipment to smuggle.
I'm thinking that because she was a dancer, SR would be good, but since she was in illusion boxes that were pierced by swords and saws, WP would be good.
Of course, this is for character conception, not practicality.