Asus Easy flash will not fail flashing a mod…?
Why not a dump with Intel FPT tool from ME7 tools package?
Try a full dump (for safe keeping) and separate regions, you can mod and flash a bios_region only.
This needs access to the SPI regions… at least the bios_region.
All this you already may know, due to your past post on the updating the ME
UBU 1.79.2.1 can update the mcodes of the cpu and the Intel Lan module, thats it.
Now this is an earlier 6 series system, it has no UEFI GOP driver only OROM vbios that cant be updated without first perform this:
https://winraid.level1techs.com/t/guide-transfer-of-specific-intel-orom-vbios-and-gop-vbt-settings-by-using-intel-bmp-tool