I had to use Rehab's SATA unknown injector kext for the Intel Series 10 SATA Controller in Clover. Otherwise, the installer would not see any of my drives.
I am using InjectIntel with ig-platform-id = 0x19160000 for my graphics. El Capitan shows me Intel HD 520 1536MB.
Youtube videos play perfectly within Safari. Amazingly, I even can do Airplay mirroring (albeit with artifacts) to my Apple TV 3.
For my integrated NIC, i'm using
Mieze's RTL810x drivers. I had to remove my network plist and remove all my network connections in System Preferences (to reset the NIC to en0). That let me connect to the App Store and iCloud.