Quote Originally Posted by YukariOro View Post
Just this. Wiped recently on Sastasha HM because the dps and tank weren't interrupting the first boss's attacks at all. Made it nearly impossible for me to heal easily. Came back, they planned out when to interrupt and who at what time, made the fight a breeze. Fortunately that was one case where they didn't blame me and put in a group effort to do better. Wish all groups did that. =D
Most groups, in my experience, will not even bother with attempting to interrupt the boss' Tail Screw since it's a non-lethal mechanic and not worth getting a DPS stunned to free up the tank.

If you begin the round of Esuna/Leeches as soon as the slimes drop, this mechanic is trivial (assuming that your party members are properly spread and not eating multiple stacks).