Wwe have had a number of very talented 'teachers' to help us learn the basics well and then work to perfect what works best for us..and our needs..
Few of us will have the same needs that Fairbairn & Sykes had policing in Shanghai..

This article below covers briefly some of the techniques taught and used over the years, including Bill Jordan, whose book 'No Second Place Winner' was one of the first I read when training years ago.Jim

http://www.spw-duf.info/point.html