I run Linux + Android on my devices so can't check out Reeder unfortunately. However, my setup works fine:
- RSS: FreshRSS hosted on personal server, use web interface on desktop and the truly awesome FeedMe on mobile
- Reading: Wallabag hosted on personal server, use web interface on desktop and the Wallabag app on mobile
- Bookmarks: Shaarli hosted on personal server, use web interface on desktop. I can share articles on mobile via Shaarlier but not consult them - but I don't feel the need to; I use it as a "check this website later" thing where I delete the entry after checking or storing it in my org-mode setup if I want to keep it.
Reader would replace pretty much all of that, which is nice. But it comes at the cost of 1. monthly subscription, 2. not truly owning my data/product and 3. storing all my info on an external server which I am actively trying to avoid with the above setup.