I'm having trouble on Hard as well, but at least part of that is I chose to replace Josef and Rydia on my team for Snow and Vanille for the duration of this event. So far they're not completely useless but neither are they pulling the weight I need to master Hard, but that's forgivable since they're a good 20 levels below the rest.

I also don't like this event format compared to the others. Oh look, 3 - 5 random bosses in a row when I should be saving my big guns for Anima. Yay.

Is Regen completely underwhelming or is it just bad for this event? Every time I have use Snow use his limit break I don't see any noticeable effect until he's already dead.