Been a long time but overlapped wires at least wire diameter exposed is probably preferred over bird caging. Most of the standards are setup maybe not for strength but so you don’t have a “blind” joint and can check to see if it has the proper fillet or was “interrupted”. The later in Lead/Tin solder usually looks dull under a 4x scope. I had all 3 classes and 3 states memorized by application but I can’t remember a few of my kids birthdays after the accident. Could probably dig out my J-Standard/610 book of someone were interested.