If I was in a high stress situation I would default to what I was trained to, keep your effin finger off the bang switch or on the safety. I don't see how doing anything different in a high stress situation can cause anything but confusion or possibly Glock leg.
Keep your finger off the trigger is common sense, Unfortunately some people don't ,that's were a safety can in some situations can prevent a N/D. A bit like its common sense not to speed but most people do, that's were a safety belt comes in handy.
First keep the gun pointed in a safe direction...This is first because if the gun does go off we do not want it to injure or kill
Second keep your finger off the trigger until you are ready to fire...this second because we have already made it safe if it does go off and now we want to prevent it from going off.
I emphasize both rules and have even had students just hold a dummy gun for a while to practice trigger finger position. I even encourage students who are having trouble with it to practice at home with an unloaded or dummy gun. Getting into the habit that the finger goes high and away every single time you touch a gun makes you much safer