After hours of scouring the files, I finally found what files were conflicting with each other.
It's the light rogue armor variation. It replaces two of the most badass mods in the pack. It's in the Rogue Armors file.
At first, I removed the whole folder, but later I found the three specific files.
The file path is Improved Atmosphere> 1. Global> 1.4 Items > Materials > Rogue Armors.
The three file to remove are:
1. armor_light_variation_rogu.gda
2. boots_light_variation_rogu.gda
3. gloves_light_variation_rogu.gda