Ten
That's precisely what the rest of us are working. Your Ninth self is setting up a way to track the Master and Elizaveta to ensure they don't go about doing something we need to stop. You Eleventh self seems keen on talking to Elizaveta to talk her out of it. Though I know it will fall on deaf ears. I've tried lecturing the girl for years to stop, but she never listened. She believes she can undo a fixed point in time without consequence. There is no possible way to do that without time collapsing in on itself.