Just wanted to thank you! I have the same mobo, and it's basically the only tutorial I found for making a hackintosh out of it. Looks like multibeast isn't compatible with it for some reason. I've been looking for a way to install macOS on my PC I built for this purpose. I did exactly as you did, except I installed Catalina instead of Mojave. The only downside I have is pretty minor as for some reason I can't reboot into macOS, while "normal" booting works just fine (ie, I can boot into macOS and reboot the computer into Windows 10 or Ubuntu but not into macOS, which gives me the infamous "still waiting for root device" error if I do).
Thank you!!!!