Do you have working iMessage/FaceTime/iClould. Simply as you will need get your variables moved over to Clover. You can update directly to macOS Sierra, no need to hop there via El Capitan.
A couple of options :
1. You could install using UniBeast/macOS Sierra over your original install partition as you've done in the past. Please back your data as always.
2. Install Clover/FakeSMC.kext/Ethernet kext (Latest from here
https://www.tonymacx86.com/resources/categories/kexts.11) to your Installation drive. Make sure you can boot your system with Clover before removing any conflicting kexts from /S/L/E or /L/E/ including your /Extra folder.
See
How to Backup and Remove Chimera and any Related Files, tonymacx86 has listed the kexts that can be removed.
Once you are able to boot using Clover, you should be able to download macOS Sierra (back it up first) then run the Install.App. MultiBeast for macOS Sierra has now been released for Post Install.