Install armory 2 times in separate folders

Configure one to never have internet access and block it in firewall. Install private keys in this wallet. Use it to only sign a tx.
Open the other wallet which has internet access > import signed transaction > broadcast

Will this help a little from a security point of view? Seems to me that it will help with any bugs in the wallet software. Of course external factors like keyloggers are still going to be an issue...

Just curious. Not planning to do this.