I believe the -10% from Fire passive makes this one a lot better against Fire mobs. Double up on these takes out -20% of all damage I'd believe. This makes this one amazing for Fire mains who intend to fight through Fire mobs in Accessory quests for example, I'd imagine.Sadly, I slept badly so I missed out on the extra Ragnarok and 2-4 pots (2 from Shop, 2 from daily Event Quest).
I also made a video of my R Hime Ult clear, buuuut... turns out there was nothing to it. At least not for a Thunder main. Oh well.