You let your wife see the price of your gear? That's not survival, that's attempted suicide!
Just remember to leave aclause in your will that she is to sell your gear for what it's worth, not what you told her it costs.

Even an AA mini maglite used kubotan style (fist strikes down as a hammer is simplest) will be devastating and you need a keyring torch anyway.
What other weapon can you carry in your hand, at any time and then say 'I had my keys in my hand and tried to push him away, people use torches as weapons? really officer; I had no idea!"
To give an idea of how much force you can get; the Surefire pen has a windscreen smashing cap.
The Sock