Basically the title, every 10 defence could reduce the time by 10%. It would solve the problem of going underground in hardmode expert, oh you're stunned, every enemy runs up and hits you and you die in a second.
I've fought three medusa in the last hour and they've all done the same thing. They start doing their attack animation, then it instantly cancels and I instantly get stoned. Are they not supposed to have to scream at you for about a second for you to get stoned and instakilled?