Decisive meaning lethal? Or are we talking about a positive resolution to the situation that is not lethal? The former is a deviation from the thread but the topic is so thought provoking we should explore it further. Other lethal defense could include but are not limited to blunt objects (ball bat, staff, etc), edged weapons (sword, knife, axe, etc), bow and arrow (or crossbow), spear, electrocution ... the list could go on. I fear I am missing the point of your question though. The latter is nearly as complex. Nearly everyone has touched on some successful resolution options in all the threads. From locking a door to keep the intruder at bay until police arrive, to using pepper spray to incapacitate the intruder until police arrive or you can escape (didn't you suggest bear spray in the other thread?), or escaping the situation altogether. As Nighthiker commented, anything that keeps you and yours safe. Perhaps combinations of the tactics here, maybe something like using the pepper sparay to incapacitate and keeping a blunt object handy in case he blindly grabs you. Many of the larger tactically oriented flashlights have a blunt force option built in. A friend of mine who is with our local fire department uses a 5 D-cell maglite for this very reason.