Have not received any further feedback on this, I will attempt an answer. I think that I would probably do an overview page with the general "figure 8" shape, along with the lines of latitude labelled and the approximate horizontal placement of the month labels. Then I would do a detailed cropped page of only the area from 20 degrees North to the Equator. The text provides a detailed description, so simplify as much as possible to provide a reference to accompany the text.
This is a tough one, overcrowding to get in all the information will make it cluttered and of little value to the reader. Good luck!