Thanks for the info. I couldn't understand why it and the gnawer were resisting me being such lower level but I didn't spam it on the gnawer as much. I did it on the wyvern just to prove a point. Damn wiki made no mention of it, of course...
Here's some details about charisma/mez that I found but not sure how accurate:
https://www.project1999.com/forums/s...9&postcount=10