Depending on a number of things, it may very well be best that we stay put with the family in one room and wait. It may even be best to dive out the window if you can get everyone out safely. It's not always about fighting which I'm trying to grasp myself due to the situation with my psychotic brother in law.
I know what I do when someone is a threat... And it's quite different than what I originally thought I'd do, which turns out to be a good thing in my case. What I think is always a good thing to do is clear your house maybe once a month when no one else is home. We need to have a plan, but we also need a few more plans because it'll never go like we think it will. We need to be mentally prepared to fight and fight hard. This is one of those cases where it's perfectly acceptable to kill a fly with a sledgehammer (forget who said that but it's a quote in the BCM catalog).
What also is a good idea is to review as many videos of shootings as we can find and watch the reactions of those shooting and being shot. How long does the whole thing last? After the first round impacts one of them, what is their reaction? I've seen enough to know that I don't want my family in the same room as a gunfight. I do my very best to overthink every scenario and view it as there is a group of men intent on doing me harm as opposed to a burglar that doesn't want a confrontation. This thinking saved my life once.
I know it's not nearly as much fun as hitting the range, but it's just as important, if not more in some cases.
Alright, sorry again for the drift!