You are all over-thinking this, use a good crimp...
30 - 50 ton press, thick wall on the sleeve, and crimp to 75% - 85% of sleeve od to across flats of hex...
I did the pull testing and design verification testing for developing the transmission cables for Saturn and the Chrysler JA Cirrus/Stratus...
We cycled the Saturn cables with 160 lb of force on them for over 100,000 cycles on our test fixture.... Including some of that testing at - 20° F for part of those cycles...
A good crimp will hold...