Suggestions for "consolidating" 5-7 BMs into once a day

apologies for lengthy post:
After months of alternating between many days of constipation and then days with multiple loose stools every day, I think I'm getting closer to the "recipe" (read protocol) for regularity.
Following this protocol, I've had bowel movements every day for the past couple of weeks!! The only problem is that I'm having 5-6-7 movements from morning thru mid-afternoon.
What can I try to "consolidate" my BMs into once in the morning, each day or every other day or couple of days.
BTW, the "recipe" that I've ultimately arrived at is
--1/2 senna every evening or every other (coming down from several weeks ago very high doses to relieve the constipation),
--a short walk (15 min) first thing every morning
--6 prunes with 1c water after the walk
--continuing throughout the day with as much water as I can remember to drink (not my strong suit)
--doing my best to keep fiber intake up but especially with some edamame with dinner.
PS throughout this saga, my PCP and GI doc have suggested "experimenting with" miralax, metamucil, citrucel but they're not too specific about how I should experiment and since the situation right now is better than it's been in months and I sure don't want to go backward. Also, they don't seem too interested in talking about dietary changes but I'm happy to go that route.
with appreciation in advance for your thoughts.