I lucked out a few years ago when I came across an Estate Sale for the estate of an Electrical Engineer from the City of Los Angeles, Dept of Water and Power. The departed it seems was a tinkerer and I purchased a few really high end tools for next to nothing. Among my finds were several crimpers for #10 to #2 wires. I guess I could look up the pressure that can be exerted but I accept that it is sufficient for automobile and MoHo wiring needs. I have purchased a number of #10 to #6 lugs in a variety of stud sizes and I don't think I'm going to have any problems with these crimped fittings.
So far I haven't needed to crimp anything larger than #6.
In my profession we made literally millions of splices and installed millions of AMP style crimp fittings. One of our vendors took to soldering and crimping crimp fittings. It prove no more reliable than just crimping. Most of our splices were in #'s 14, 12, and 10 wires bundled in cables and encased in buried conduits. We used 3M Scotchlok type splices and used PVC tape to keep moister and dirt out of the splices. Very few failures due to moisture. Certainly not enough to warrant shrink tube or gel filled scotchloks. Soldering never proved to be a better joint than a scotchlok.
Just my experiences over 32.913 years working in traffic signals.