He uses them with military training but otherwise uses std hard shackles. in reality the hard shackle is overhead rated for its stamped weight and controlled by a governing body for quality and specs..
soft shackles are not, period.
rope has a governing standard, but not rope in a soft shackle configuration.
On the line to have been using master pull classic lines. Dyneema HMPE
I’ll be doing a Safe-Xtract line (60’) on the new come up winch though, I like the color bands so you can quickly judge speed and distance.
Splicing is pretty easy, razor blade, pen, and some electrical tape is all you need (but a cheap fid off Amazon is nice to have)