My current setup:
[Win7] Armory Online with a fully synced blockchain and read-only wallets.
[Ubuntu] Armory Offline with no blockchain and the actual wallets.
My flow whenever I want to send an offline transaction:
1. Create an unsigned tx in Armory Online (which has the blockchain and therefore knows my account balances).
2. Copy the unsigned tx to the airgapped machine with Armory Offline and sign it.
3. Send the signed tx back to the online machine and broadcast it with Armory Online.
Keeping synced with the blockchain is a PitA, though, so I'd like to stop relying on Armory Online to create my tx's and broadcast 'em. I'd like to know if it's possible to:
1. Create signed transactions directly on the airgapped machine (even though it can't possibly know my account balances).
2. Broadcast them by any other means, for instance using Blockchain.info's Broadcast Transaction endpoint:
https://blockchain.info/pushtxThank you