I tend to shave simply, find what seems the most efficient angle and try to stay with it, no changes, no buffing, but maybe I will try that week 3 or week 4
During my first fixed four I used my favorite kit. Fatip Grande, Polsilver SI, Yaqi Silvertip and Captain's Choice 45th Parallel cream.
I only used a single blade, flipped for each shave. I never tired of the scent of the cream, its great stuff, mild and very good.
Each shave was done at around 48 hours as I shave every other day. Each shave started directly ATG buffing and my razor didnt stop until I had no feedback from it. Then I'd wipe with a wet hand and feel around, knowing I'd be BBS everywhere but my swirls. I'd paint lather over my neck and buff in an opposite direction until I had no feedback again.
Every shave was the same. One full pass and less than a 1/2 pass clean up on my neck. Each shave done in under 5 minutes from loading my brush to toweling off.
Those shaves were so good I kept using the same kit for another week until I took the blade to shave #20. That shave was as good as any shave I'd had and better than most.
I only tossed that blade to try a Gillette Yellow, everything else staying the same, and I used that blade to shave #9. It didnt have enough left in it for a 10th.
My next fixed four was with a razor I like, my Gillette Regent, a blade I dont, Feather, and a soap I really liked, Tabac. By the last week I had more than my fill of Tabac. I'd also used 10 Feather blades.
My advice is, if you're planning on a fixed four, pick your best performing components and choose wisely. If any have a shortcoming, you will find it lol.