At it stands, now, I have gone through the editing process with six books. I learn more each time I get to this step in the publishing process. So, for what it’s worth, I recommend you use these people, in this order:
Do an ongoing edit of your manuscript, as you share your submissions with your critique group, chapter by chapter, from Prologue thru Epilogue.
When your book is finished, edit your manuscript yourself (at least a couple of times—more, if you are a perfectionist, like me).
Send it to your Beta Readers. They will catch a few things, too.
Send it to your Editor and make the suggested corrections.
Finally, let your Critique Group Read it in its entirety. Note: This is a new step. Here’s why I am suggesting taking the time to do this: my group accepts submissions from each other twice per month.
Often the chapters are out of order. And, because this process can take upward of one year, it is not like reading a book, chapter by chapter. They miss the flow and this especially affects the understanding of the timeline. (It isn’t their fault. These two factors make it almost impossible for them to give good feedback in this area).
If your critique group agrees to read each other’s work–all the way through, one last time–they will be able to experience your story from beginning to end and catch any glitches.
Yes, it is a bigger commitment and not for the faint of heart, but if you are truly committed to help each other be the best you can be, then the results can be of great value.
In talking with my group, they were positive about trying this approach—at least once.
I suspect it will be time well spent.