Load the save into the Save Editor to adjust your desired values.

C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\[Account ID]\856 .

Editing save files can corrupt your data.

The most widely used and updated save editor for Far Cry 4 is:

This tool allows you to not only edit but safely . It works by detecting your Ubisoft/Uplay save folder and allowing you to manipulate the data before loading the game.