I ran a vision of destruction with my tank who is level 17 with a 64 intimidation on normal. I would get the light to pop over his head but many times he would still turn.
Let me be clear so everyone understands exactly what happened. I tanked him like I do all the time and pull in the corner. Go into stalwart defender mode and just turtle and hit intimi. He would be swinging away. Then the group would see me hit a fresh intimi and then go swinging and with the yellow finger over his head he would still turn. he did not do it all the time but it made no sense. I asked another tank and he said that happened once with horoth for him. It is not a question of how high my intimidation is as he failed the save (thus the finger over the head). So it not like they bumped up the save on this quest. It is just weird as he would turn but kinda was random. Since i was not attacking at all then if it was damage related he should have turned everytime. However, I could hold him for a while so just not sure what is happening. He would just randomly turn whether freshly intimidated, 2 secs ago, or whenever.
I ahve tanked him a fair number of times and have done the quest alot with other tanks and never ever saw his head light up and him turn right away. That happened around 10:45 EST on October 21st.
Would love an answer if anyone knows it.