I think it uses your write list. If this future wayback street fork of nwa could integrate something like the relay set options that lantern has, I would send my archive activity to a dedicated relay....
When I tested NWA it didn't use the Pyramid relay I added to my relays. But I'll look into it Deeper. Either way you're Right,, NWA should be extended to allow Selecting Which relays you want to publish a given archive to. Whether that's from your Current Set or an Arbitrary / One-Off relay.
Will keep you Updated,, as you are a Prolific Archiver! Please feel free to share this initiative with any other Archivers you are aware of. And if you know any Nyms who are looking to make a Dent in the world, please send them to the @Admin Tom Cat ❋ - http://6vhvsk7ximifkmnsv74ataoiit37lmpp2fmqkxcojdwf7dqe6ls22qad.onion/
Will keep you Updated,, as you are a Prolific Archiver! Please feel free to share this initiative with any other Archivers you are aware of. And if you know any Nyms who are looking to make a Dent in the world, please send them to the @Admin Tom Cat ❋ - http://6vhvsk7ximifkmnsv74ataoiit37lmpp2fmqkxcojdwf7dqe6ls22qad.onion/