So thats why I tried experimenting the lib files of old 4.1.2 into the last 4.1.2 update and got successful result.
1. Must be on firmware 15.0.A.2.17(Latest 4.1.2)
3. Unlocked/locked bootloader
4. ADB drivers installed
1. Extract the zip file
2. Make sure USB Debugging is enabled and connect your phone
3. Run PUSH-SYSTEM and grant root and follow instruction
P.S. There are still a lot of unneeded files/lib inside so I'll be glad if someone can help me out clean it