Author: sadsadsadverysad
http://www.nexusmods.com/witcher3/mods/2352/?

Description:

Many players have noticed that Hunter Instinct skill does not increase damage, eveт when all the skill conditions is met. This mod fixes the Hunter Instinct skill, making it work like described.

How it works:

Vanilla skill description (at level 5):
"When Adrenaline Points are at their maximum, critical hit damage against the targeted enemy type is increased by 100%."
Basically it should give +20% critical damage for every skill level (+40% for level 2 and so on). But, seems like developer have forget to multiply by skill level and Hunter Instinct always gives +20% crit damage no matter the level. That means, that in vanilla game skill gives you +20% crit damage on level 5, just like on level 1.
So, actually skill works on vanilla game, but does not scale to skill level. And +20% crit damage bonus is simply too small to notice. This mod makes critical damage scale properly.

Compatible with 1.31 GOTY/nonGOTY.

Compatibility with other mods:

This mod alters playerWitcher.ws.

If you have other mod that uses playerWitcher.ws you will have to merge them.
Script Merger might help.

Installation:

Using Nexus Mod Manager:
Download with NMM and simply activate mod.

Manual:
Download manually and unpack "modHunterInstinctPatch" folder to Witcher 3 game directory/mods folder (example D:\Games\The Witcher 3\mods). If mods folder does not exist, create it.