If people are having this much trouble with Sephirot, these forums are going to be on fire when Zurvan Unreal happens. I'm not even sure what exactly people are struggling with in Sephirot, he's not all that mechanically difficult and the bulk of his mechanics have appeared in other fights since Heavensward. People not knowing how to do the bait before the knockbacks is the only thing I can think of that'd really trip people up, as people might initially be afraid of standing in a big blue instakill marker to bait the AOEs.