Last night my guild attempted XT Hardmode and fell short. We were having a difficult time handling the tantrums and dealing with the Life Sparks.
We manage to get XT to 50% consistently (one time at 40%) but a lot of the players would get the 3 combo of Light Bomb/Gravity Bomb/Tantrum back to back to back. Resulting to death.
Overall I like the challenge. I hope we can take him out the next time.