The Fox Marvel Universe in chronological order starting with the events of the original timeline to the change to the new timeline. This is how I envision a true chronological watch order would look like with all FOX Marvel movies, including the Fantastic Four and Daredevil series if they were in the same universe.
In the first movie X-Men: First Class' events has always happen regardless of timeline so we start there, then we first move through the original timeline with the X-Men films with Daredevil and the original Fantastic Four films mixed in for flavor. These movies were placed mostly by released date next to others released around the same time. If they were apart of the same universe, it makes sense to me, that they would happen around those times.
Once we reach The Wolverine, because of a special scene in the movie it's implied it leans into X-Men: Days of Future Past where the timeline is "reset", so the movies that follow X-Men: Days of Future Past is the new timeline continuing events as they happen.