The TWRP I have provide uses the kernel of the version 4/64 of the Maze Alpha, if you can give me your boot.img I can try to make an other version of TWRP with this kernel, so it will be specific to 6G version.The thing is that I have no issue with flashing the software as I can perfectly flash the original rom. The problem is that when flashing the TWRP file, in both options by the way, so also via method 1, I get a boot loop.
Or you can make it yourself using your kernel and the version of TWRP for 4/64, bu using the Carliv Android Image Kitchen.