Interesting tests. On my heaviest kayak outfit I use 100lb braid, one of those heavy wind on spro swivels, as you have above, and a 40+ft leader of 130-250lb mono. On the mono end, I use a crimp, on the braid side of the swivel, a San Diego Jam knot.
The circle hook is attached with a crimp( smaller than most knots)
If all goes well, I pull a grouper out of a wreck.
Otherwise, it is hard work to bust off a snag....