This is pretty simple to do and I found it out while messing around on my own:
Open up CE, attach Game.exe
Once you login, tick unrandomize on the Cheat Engine
If your character's eyes are closed you have done it correctly
Go ahead into a map full of mobs, they should be missing on you now
Note: This doesn't seem to work on lower level characters, it started working for me at around level 14 for some reason, but not before that.
You will also need to disable GG for this to work. There have been posts on how to do that on this forum.