I need to revise my guide as I no longer fully agree with myself on every item on my original post.
I also agree with @Shendai .
TelegromFOSS is bad for battery.
Aves has internal video player, Simple Gallery doesn't. Simple gallery has internal editing tools. I believe Aves doesn't.
If you need extra browsers brave is a better option than bromite.
LibreTube is better than NewPipe for privacy, but both have their merits.
Checkout an app called UntrackMe. very useful for privacy when opening links in the browser for some common websites. Gives alternative frontends in the browser to read/view comon websites like youtube and reddit. Very handy for me.
You don't necessarily have to install Google Camera and Google Photos in a separate profile like I recommended before. How and where you install them depends on your strategy and how isolated you want them to be. You can certainly test install them once in a separate profile to get the hang of the process as a practice run.