Hey, it turns out there is a glitch to beat this quest very easily. Now to do this,  you need to take the ring, save, go talk to Likens meat puppet, fake Sassan, and go get yerself killed. After you die and load up the game again, you should respawn in the tunnel behind fake Sassan, Skipping the whole abomination fight. I needed the XP from the fight but I couldn't get passed it. Well if this helped you, YOU ARE WELCOME!!!