I mean I don't understand locking the wallet and waiting 10 days and unlocking it. It only makes sense to me to keep all the coins in an unencrypted wallet all the time to get the most out of staking.
Locking the wallet is just for security. I get the most from Pos coins by opening wallets often. I have to open in rotation, because I have over 30 different PoS coins, and tend not to be staking more than 2 or 3 at a time, but you will get a little more stake by leaving the wallet open.