For the most reliable "save for each mission" packs, check these communities:
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\[Account ID]\856
Installing a downloaded save file is straightforward, but it varies slightly depending on your version (Uplay vs. Steam).
For the most reliable "save for each mission" packs, check these communities:
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\[Account ID]\856 far cry 4 save file for each mission best
Installing a downloaded save file is straightforward, but it varies slightly depending on your version (Uplay vs. Steam). For the most reliable "save for each mission"