Replay is the longest part, takes years usually. Stage watching I have found is futile. MLCers cycle so much and then just when you think you see forward progress they seem to go backwards. It is all part of the process. Also, the depression and withdrawal is present the whole way through, sometimes more obvious than others. They are in crisis and there isn't anything you can do about it so just trying to detach and not watch too closely is the best thing you can do (and believe me, I know how hard it is not to watch while they are in right in front of you).
FWIW, my husband sure seemed to be high energy for the months leading up to and right after BD. I saw it in bursts once in awhile after that but it really, really slowed down. His drug of choice to run and avoid since then for the most part has been workaholism and trying to keep busy with work projects.