I don’t have a script so much as I have a rough outline of where I want the story to go. Then I just come up with a rough draft each chapter.
I do this by backing myself into a corner, always drawing the last page in the batch first. Then I do either the first or the middle most page next. It’s easier if I have scenes I know I want to land on for the spreads. Tho I don’t always hard follow this rule, I’ve gotten lax about it but I always do a spread on the last page of the batch.
Other than that I’m just winging it. XD
Also I write and draw my stuff myself because I’m a control freak who can’t submit to the whims of a writer. I have too many ideas and I don’t like sharing. My gift and curse is that I’m too creative so I’d just come up with too many ideas and probably drive the writer insane. I do that to basically everyone all the time anyway. Once I even tortured fanfic writers with my ideas, because they loved them all.
I can’t do that to some poor writer unless I’m feeling sadistic. So i can’t subject a writer to my whims either. I’m better flying solo which is also why I color and ink my own stuff too. I have a vision I want to completely control.