I started using the Adjustable Grip Hitch with one extra wrap around the standing part before the final half hitch. It holds extremly well and still remains easy to adjust and untie. In small slippery cord like 550 paracord, it is much better than the Grapple Hitch or the regular AGH, IMO.
Abrasion resistance is no unusual requirement for commercial fisherman knots.
They usually operate 24 hours a day, often in muddy water, over rocks and all sorts of hauling equipment.
Factors which add significantly to abrasion.