We used to have ratcheting crimpers but somehow we lost them. Which is sad because they were always my favorite and worked like 100% of the time.
Anyways, when we crimp terminals, this is the method we use
1. Normally strip the insulators
2. Get heat shrink
3. Strip wire, put it in the terminal
4. Crimp it as much as you can
5. Put as much solder as you can possibly fit, you can never have too much
6. Heat shrink it (makes it look nice and insulates)
7. Pull-test it
That works for us, and we notice when we don't solder, even with a pull test, they just randomly fall out for no reason.
Hope that helps
