Here's <Chosen>'s accomplishments:
4-man SM TFB Writhing Horror (video: https://www.youtube.com/watch?v=e4xs_vbgCSw
5-man SM TFB Dread Guards
14-man HM TFB Writhing Horror
15-man HM TFB Dread Guards
15-man HM TFB Kephess
We couldn't quite beat 15-man TFB last boss but we gave it a shot. Hope to try that again soon.