Issue resolved this thread can be locked or whatever. I got it the fourth time.

When I first fought Harken I used my werewolf form to fight him. I got up to the third phase where he puts his shield up the third time, my werewolf form times out and the game freezes mid transformation. Second time I did the fight I didn't use my werewolf form because I thought that was the issue. I got to the same point and my game froze again(probably due to the amount of effects on the screen?). I'm about to do the fight a third time I'll let you all know how it goes. I might lower the difficulty to end it faster but it's getting annoying because my xbox won't shut off when I press the button it just sits there for 5 minutes while it's frozen.