My TWRP has been installed permanently.@BenjaminVC, you need to put the phone in fastboot mode (with phone off: press power&vol-). run "fastboot flash recovery mali.img", then refer to my post #56 for steps.
@wesleyjrz, what didn't work ? at what point are you stuck ? my phone is a XT1925-5. I'm surprised there would be such differences in installation experience...
I installed the ROM via ADB Sideload, cause when I installed it with TWRP using "flash zip" it got stuck in the bootlogo.
My phone is a XT1925-3. I'll make the necessary backups and try to follow your steps today.