A free mod for Witcher 3, by tbellovics.
Customizable Exp Modifier is a modification for the game. It allows you to modify the gameplay by changing the XP (experience) multiplier for quests and enemies, based on difficulty. It has multiple sliders for all the options you can configure and a unique menu.
How to install:
You can find the download link in the description of this application.
Once you have downloaded it, you will have to install the Custom Localization Fix mod by UACvax. The installation of the mod is very easy. All you need is to open the application, find the link and click on it. You will have to open the settings menu. Then, click on the Customize menu option. You will have to set the options that you want to modify.
Now you can download the mod and install it.
This application is compatible with all the mods that use the Customizable Exp Modifier by UACvax.