Thanks for the sweet words Xer Xian! As I kept finding new strategies and my route was constantly changing I just never felt I had a run that was "complete". This was probably my main motivation to keep going. I'm at a point now where I feel that I probably have found most of the exploits. Can't think of too many other things that could work.
Pink Sweets scoring works on very many different levels and the interplay of the mechanics takes a lot of balancing sometimes. For instance:
1) Do you want to kill enemies with your shot so that they contribute to the zan counter = extra lives trigger OR do you want to kill them with your Rose Cracker = more points?
2) Do you want to suicide graze milk a particular attack, which then also lowers rank OR do you want to keep rank high to rather score from bullet absorption?
...and several similar questions make routing this game a very intriguing task! In a way, it can therefore perhaps be considered similar to routing Ketsui on a high level, although I think that Ketsui is much more extreme in this regard. One of my favorite parts of the game is how flexible rank management is. You constantly go from low rank to max rank and back again. The player has much more control over this in Pink Sweets than in any of the other games by Yagawa.
Scoring with infinite lives also gives the Pink Sweets a very unique feeling in general - for better or worse -, which is surely a polarizing experience. At the very least we can probably agree that its mechanics are unorthodox.
By the way, I have uploaded a replay for my score, so if you are interested, give it a look when you have that 90 minutes to spare! Unfortunately no sound as I was listening to copyrighted music during the stream. To give you a basic idea of how scoring in this game looks like, I'm hoping this video may suffice.
https://youtu.be/x2fjamRIu4Y