Item description:

I understand the instructions for infinite health and how to kill the boss for revenge revisited aren't very good. The save/instruction files weren't made by me so i've made a little mini guide to help you.


Preparation:

Find the save for Revenge revisited (story hard - glitchable). This save should be right before the 2nd last mission.
Make sure to upgrade where you can, you must get critical pain devastator since this will deal some heavy damage to the boss.


The Glitch:

To do the glitch you must start one of the war events however there is one in particular that I found easy called 'raid' and it should be fairly close to your location when you load the save. (location shown in image below)

Start the raid war event (without a vehicle)
Let the enemies deal damage until you are flashing blue
While your almost dead, press start, go to quit and restart the event and then restart the event again.


You should now be invincible, start running away towards the start of the 2nd last mission which will also quit the current event.




Tips on killing the boss within the time limit:

Immediately start picking up helicopters/jets and throw them at him making sure he doesn't knock them out of your hands.
Aim to use at least 3x critical pain devastators to take a big chunk of his health off.
Try not to get hit by his attacks since they will slow you down dramatically.
Finish him off with your blades or whatever else you can come up with.