This very much a case of the legal landscape as you think it should be running up against the legal landscape as it it.
Listing home defense as your reason to apply for an NR PAL is one of the best ways to make sure that you're denied.
There's a whole rats nest of intermingled precedent- R v Nelson, R vs Sulland, R v Kerr, R v. Macdonald, and now R v Khill that illustrate that it's not as simple as the bold, that the imminence of the threat when you armed, the use of the item pre-threat, and your behaviour leading up to the confrontation all play a role in both the success of your self defense argument for the use of force, and the whether or not you're exposed to other breaches