First draft and thumbnails

I have the first draft of 5 chapters and rough thumbnails of 3 chapters done. I had planned on doing 6 chapters for this project but the chapters I have done turned out to be longer than I thought they would be. My plan right now is to start drawing the 3 chapters that I have thumbnails for, and if I have extra time after that I can do another chapter. I'm also still figuring out the text to visuals ratio because when I was working on the thumbnails I found that I had a tendency to draw every single scene or action that I could visualize. I need to decide which scenes would actually benefit from being visualized and which would benefit from being verbalized.