I saw through the illusion of the swamp. Killed the Redcaps. Killed the Gur. Went in to the hut, told Maryiana about her dead brothers, fought her in the hut. Went through her hideout, knocked out the 4 mindcontrolled guys. Go through waterfall and make my way to the final fight. Fought her, she sets the cage on fire. Put it out with a water bottle. I believe she only used featherfall after that. Got her low and then she surrendered. Went through the dialogued and intimidated her into leaving myriana and giving me her hair. Never got the hair.
Tried to be as detailed as possible to see if anything of this is making me get the ability point. I know this is a known bug, but wanted to see if there is a way around it.