Want to play these three mods with full compatibility with each other?
- DAH (Death and Hit reactions) by WebKnight: Adds a huge expansion of new hit reactions and death animations.
https://steamcommunity.com/sharedfiles/filedetails/?id=2993442344
- PiR (Project Injury Reaction) by Cucumber: Adds different types of reaction on injury (and its own revive system).
https://steamcommunity.com/sharedfiles/filedetails/?id=1665585720
- APS (Armor Plate System) by diwako: Adds ceramic plates system (for players and AI) with its own (squad AI) revive system.
https://steamcommunity.com/sharedfiles/filedetails/?id=2523439183

This is the guide for you.

The tweak is simple.
1. Navigate to Project Injury Reaction's addon settings.
2. Find "Enable injuries for player:" option
3. UNCHECK that option.
4. That's it. That's all you need to do. Literally.
5. You can customize APS and DAH to whatever you want. Just DO NOT ENABLE INJURIES FOR PLAYER from PiR options.

What do you get from doing all of this?
99.9% Compatibility with these three mods:
- NO MORE instant death/"One shot will knock me down, just like having no protection" ISSUES when in the middle of a hit reaction animation. APS' armor plates are NO LONGER ignored when in the middle of hit animations.
- Hit reactions from PiR and hit + death reactions from DAH working as intended
- WORKING PROTECTION from armor plates protecting you (giving you more hp) from APS (obviously won't make you immortal though lol but more survivable and fun gameplay :)))
- WORKING REVIVE SYSTEM (for player self-revive and player's squad AI reviving) from APS and/or PiR (see below for instructions).

Huh? A Working Revive System Tweak?
So if you want to use one revive system over the other, or maybe both from PiR or APS. The explanation for both revive systems is below from my testing:
- PiR: Makes it so that ALL AI (no matter the side) and players are able to become incapacitated, and revived from their friendly units with "PiR" custom first aid kits/IFAKs and medkits. There will be dragging as well from AI to AI/Player for the incapacitated. Player CANNOT self-revive.
- APS: ONLY the player's squad AI and player themselves are able to become incapacitated. There's no dragging. Player CAN self-revive however.

Using one, or the other, or both- is decided with the options you check regarding enabling the use of PiR's custom replacement or addition of IFAKs and Medkits.
If you want PiR + APS revive system together (this can be glitchy) then:
["Disable Standard IFAKs:"] OFF
["Number of Additionally IFAKs"] ANY NUMBER OTHER THAN ZERO!
["List of replaceable IFAKs:"] *LEAVE IT EMPTY
["List of replaceable medkits:"] *LEAVE IT BLANK

*This keeps Vanilla IFAKs and Medkits that APS uses, but also adds additional "custom" IFAKs from PiR so that both revive systems work together. It can be kind of jank though... I haven't fully tested these settings out yet but they might conflict and break when AI go to revive other player or AI... Better to use one of the bottom two below.

If you want only PiR revive system:
["Disable Standard IFAKs:"] ON
["Number of Additionally IFAKs"] ANY NUMBER OTHER THAN ZERO!
["List of replaceable IFAKs:"] FirstAidKit
["List of replaceable medkits:"] Medkit
*REPLACES all Vanilla IFAKS and Medkits with "PiR" ones so the PiR system works. APS may not seem to function and there is no self-reviving for the player because they do not have Vanilla IFAKs or Medkit in their inventory.

If you want only APS revive system (what I use in this video and my personal preference):
["Disable Standard IFAKs:"] OFF
["Number of Additionally IFAKs"] 0 (ZERO)
["List of replaceable IFAKs:"] *LEAVE IT EMPTY
["List of replaceable medkits:"] *LEAVE IT BLANK
*There may not be any dynamic AI dragging, but I like the squad revive system that APS adds. The self-revive for player if they have a Vanilla first aid kit is also a very useful feature than just lying there dying.

Have fun.

Video guide and showcase if you don't like reading: https://www.youtube.com/watch?v=9dsncYaOnkY