If I had the time. Making this took a while. But I am assuming that if I draw everything properly and lay it out well, I can cut down the amount of time I'd waste coloring this way. Also, it helps in terms of wonky pencils. Once you've laid down the paths over the pencils, you pretty much have different parts you can move around easily.
For example, I had drawn Ambrose with a head that was about 30% too big for his body, but once the paths were done I could resize it to match.