Download the Tweak Pack archive from Nexus Mods and unpack the files directly into the root game folder.
The is a curated collection of mods, configuration files, and tools compiled to work perfectly with the final update (v1.5.6) of the game.
For players who hate climbing the same sync point for the hundredth time:
Before installing, ensure your game is updated to the official Ubisoft title update 1.5.6, as this pack is hardcoded for this specific executable.