I use two computers - one offline and one online sitting one by one in my home.

On is old the offline computer which was never seen internet just installed Basic Windows from scratch and installed Armory Bitcoin wallet software and nothing else.

When I want do transactions I restore my wallet from paper seed on the offline computer and I create one  or more offline transaction files which I later use to broadcast transactions on the blockchain.
Then I delete Armory wallet from the Armory software on the offline computer.

On second coputer which is always connected to internet and fully synced with Botcoin Core client ( so I run a full node ) I have Another Armory wallet but it is watch-only copy of the same wallet  it does not have any private keys at all.

On that live computer with watch-only wallet I broadcast previously created transaction files produced on off-line computer.

The seed I do not keep at same location as the two computers- actually thee seed keys I do not keep in my home at all!