Hello,
I has read more then one guide from Odyn Mythic and was watching more video guides and now one was saying that this Potion is really usefull for this fight.
Avalanche Elixir
Use: Falling a great distance will cause you to tranform into an avalanche. When you land, deal 120000 damage to all enemies within 5 yards.
Requires Level 100
We finaly killed the boss in Mythic
And the Potion was safing my life more then one time.
I know you don't need it when you are not failing still its a long fight where lots of stuff happend.
In the video at 8:25 you see it how it works.
I hope i can help some Guilds with this information.
Your,
Holy