"Gracie Jiu-Jitsu isn't merely a martial art confined by a limited number of techniques, but rather an all encompassing system of survival guided by a collection of timeless combat principles; the most important of which is that of energy efficiency. This concept of maximum effectiveness with minimal effort is what enable Grand Master Helio Gracie to modify and adapt the original Japanese Jiu-Jitsu techniques until they were effective against giants, and it is also the core concept when dealing with multiple opponents.
In this video, Rener Gracie (@RenerGracie) and Brian "T-City' Ortega (@BrianTCity) discuss and demonstrate the three universal principles of self-defense as taught by the Gracie Academy, so you have a better chance of survival if you ever find yourself in a multiple attacker situation."
Principle 1: Diffuse the "Combative Energy" of the interaction.
Principle 2: Evade their attack with effective distance management.
Principle 3: Attack first and attack fast.
Bonus Principle: If you carry a firearm on you at all times, use it.
Gracie BJJ Breakdown - How to Defeat Multiple Opponents