The actress Stephanie Hsu likes to call herself a “soft witch,” meaning that although she has some supernatural powers of perception, her intuition can be off by a few clicks. Case in point: last year, Hsu had a sudden vision that she would be cast in the Broadway hit “Oh, Mary!” as Abraham Lincoln. (The sight gag appealed to her: Hsu is five feet tall.) The next day, she heard from Sam Pinkleton, the show’s director, who wanted to discuss an opportunity. “I was, like, Sam, this is soooo spooky, but I already know you’re going to ask me to...