I always shiver when I see a Ms. Fortune player in competitive. What I try to do is backing up and trying to never be between the head and the body, trying to dodge back and stuff. When their head is far away from the body, trying to punch the head with a low attack always scares them, and forces them to come to you where you can counter attack with something. The key is to don´t get stuck in a combo, trying to use blockbusters, burst and tag in usually help, but well, you need a timing for some of those. Good luck!