nostr:nprofile1qqsdwr2spy2sfwvj6xpcsg40y3w476e6z6uzmyt6edujfnhkrm22emsfe0ut5 amethyst handles this best in my experience. under media servers you can add several blossom servers and it uploads to all ...
That's a solid workflow, I should really set up a few blossom servers myself instead of relying on just one.