About this video

This is the fastest way to kill the final boss Tirnoch, on any difficulty.
By doing what I do in this video you should be able to easily defeat Tirnoch at any game difficulty.

Just bring "Fate Potions (at least 3)" and every-time you are drained, refill your fate meter with a potion and fate shift to attack Tirnoch.
When she falls attack her.
Repeat to complete.