Tricky
This one is pretty tricky.
I wouldn't want to use a tazer, as that requires more personal contact, and the leverage and lashing on the wrist would still cause pain.
Another thing, living in California, the idiocracy that reigns seems to have a rather hostile view of guns and has its own list of what is "Acceptable", and a listing on the DOJ website which I haven't looked at in a few years.
They also have these odd, idiotic rules about long arms. No pistol grip shotguns or rifles, no removeable magazines, and both long and short arms are limited to ten rounds.
I don't know if there are limitations on the actual ammutnition that can be used, but it would not surprise me.
Personally, I would look into other medical opinions on treatments, surgueries, and therapies to gain anything you can, as it will improve the quality of life in general.
Meanwhile, I would look into braces, wraps, straps, and any other means to sure up the body. My dad has to wear a leather brace around his wrist if he shoots more than a handful of rounds, and I suspect I may need to sure up my left wrist in the future, but I hope not. The surgery they performed to reconstruct my left wrist was nothing less than a work of art, and I am thankful it was done so well.
I have found that the PK380 is indeed a soft shooter, and even my friends wife loved it. She doesn't normally like to shoot anything other than her old H&R 22lr revolver. It was her dads, and it's a handsome gun, and good shooter.