Aside from what I removed, this should be the best option if you don't want your coins to be compromised. Keep the wallet offline and decrypt it and extract the private keys from there. You could possibly just use Bitcoin Core to extract the keys if you're not familiar with pywallet, as you should be able to use command lines without having it synced. From there I'd suggest you import it into Electrum/Multibit and send them from there to your main wallet that you want them in.