Nostream will have support for mirroring from multiple relays. You’ll be able to configure it to subscribe to specific followers, threads you participate in, etc.
Discussion
Specific authors and their follows*
This would be an interesting concept for mobile, if I'm understanding this correctly. For example, I could only add a couple relays to my profile, including my private one, running at home. Then when mobile, I wouldn't be using mobile data to post to a large group of relays, I would be using my home internet connection, therefore saving mobile data. Is this correct?
This would be amazing :D