if you are writing fiction then try to get as far along as possible, BEFORE ACTUALLY WRITING ANYTHING, to have a framework for an editor to help you with. Without that you are essentially asking the editor to do your plot for you.
How can an editor help if you haven’t written anything yet? They don’t care what you think you’re going to write – they’re looking at what you actually wrote.
I could see this approach for nonfiction, but not fiction.