Easy way: try to install with unibeast and use the thre flags that Bloodtoner said in the first page. Once you have installed, mount the efi of the hard disk, and replace the EFI files from Jomanji, (plist, 64uefi, kexts), disconnect all the USB, (didnt boot with the mouse in my laptop), once you are again in High Sierra, make the DSDT with the 2 texts paths that vettz500 said in the page 13.
If you have the razer blade 15 should work. As well I had to buy a new SSD to make it work, the harddisk that came in my laptop didnt allow me to install with Unibeast. After you have everything ready you can install the NVIDIA DRIVERS if you want to attach a hdmi display.
It should work!