I pretty much only paddle ski alone in cool water.
Stndard gear is boat leash, paddle leash, 3/2mm wetsuit, booties, PFD, phone, 2 lights (phone and small flashlight), mirror.
I have had 2 paddle break 0.5-1 mile off shore, but wind is always blowing towards shore so it’s been NBD.
Safety wise, remaining with the boat is #1. In small conditions a regular plasticg leash is adequate. Since I seek out big stuff, I use a custom Dyneema leash that is effectively impossible to break. (Plastic leashes WILL fail in big conditions)
a bomb proof remount is probably 2nd. If you’re with your boat and can get back in, problems are greatly minimized.
Related to #2, an excellent, instant, subconscious stroke brace will prevent 97% of swims. Practice stroke bracing until it’s 2nd nature.
In busy waters I recommend a road worker orange reflective shirt for high viz.
Last, I would Never keep my feet in the brace while capsizing. Feet come out as soon as I know I’m swimming and often you can turn a full capsize into a partial one (as in my waist enters the water but I can kick my leg and flopinto the bucket fast enough that my pfd never touches water. Riding a capsize out to the end sounds like bad times to me, and unnecessary.
I have trained myself to reach for the boat with the inside arm though. In all my paddng the leash has saved me less than 5 times because I hug the hull with the inside arm by default.
Just make sure you can generally get in and stay in the boat and you’re golden