Using the latest version trainer, it works, but then there are certain enemies that take no damage, but they can hurt me. Any ideas?
Have you been using the unlimited health option?(See link below)
You need a weapon modded for high damage and capable of gibbing. For the Hunters, this means a high mod sniper rifle, fully configured for damage and criticals.
The trainer won't help with gibbing.
I just figured, the more people that mention it, the greater the chance of a fix