...as for transaction in the case as you said (@HCP),
then creating signed raw tx with BTC wallet and pushing it to BCC network wouldn't work? am I right?
I was hoping by pushing raw tx would at least reduce the exposure of my priv key
That's correct... you cannot create a signed transaction for BTC and then broadcast it on BCC network. That is exactly what the replay protection is designed to achieve.
You WILL need a BCC compatible wallet to be able to create BCC transactions after the fork.