I guess this could (should?) be doable with @yetanotherpainter’s paid plugin Actuator - Automate Sequences of Actions. To begin with, you need to create a sequence of actions that you can later “re-play” as often as you like, just like a music or video playlist.
The plugin is about $10, and may be worth the investment, especially if you have to do this day by day, or it is for your job.
Furthermore, I assume, for changing the blending modes, you can create a sequence that will change them for you too. That will be done one by one, like you were doing it, but here you only need to wait till it is done.
Maybe you ask @yetanotherpainter beforehand what they say about your tasks and if they think they are feasible?
Michelist