neglect is the best, as it does not damage the hair at all. TnR doesn't do that much damage. It's just used as a method to start the sections and get your hair to begin tangling. It's not needed, but it will help jump start the process. It's really up to you. Are you willing to wait? Patience is the key. 7 inches is a fine place to start. It's short enough that it doesn't have a whole lot of hair to start tangling, which can make the process seem like it's taking forever. But be prepared, when you stop using wax and start either tnr or neglect, you will lose some length (up to 1/2 your original length).