Hi,
I was going through TA Exp and someone ordered us to follow what they do when the Boss Nightmare Vine appears.
This prevents the boss from hitting you, even with the spit and you can attack it until it’s dead.
Method
There's a ramp on the left hand side of the section with some rocks that give you a higher position overlooking the Nightmare Vines.
If you walk backwards so you're touching the wall instead of on the ledge, the nightmare vines can't reach you, and they were able to attack it still.
I had a little moan at them and left the party.
(I’m very Anti-Exploit – Sorry to others who feel differently.)
