ok so I am from a european guild (Black Horizon on Shiva) and we have like 110-140ms to the servers (ping 184.107.107.176) and we managed to kill this boss tonight. Our blackmage died in the middle of the heart phase and we were not able to ressurrect him for longer than ~10seconds. So yeah, we basically did the boss with 7 people, had like 8 stomps in the end and only 3 people survived this madness.

Now Coeurl is an american server so you shouldn't have the same amount of lag as we do -> it's not unkillable, just annoying as f.... :/

in case you don't believe me:
- our tank with the shield -> http://na.finalfantasyxiv.com/lodest...acter/1588654/
- ping -> http://i.imgur.com/KsxEDe3.jpg
- ping2 -> http://i.imgur.com/PWdPm7q.jpg