I'm not a ranker, Ice Wolf Fenrir's a pain in the ass to fight due to servants buffing the entire team instead of the FAW, and to top it off, Fenrir can't be obtained as a drop reward at all.
Fuck this event. Still clearing the map anyways and most likely gonna focus on campaign after that.
Edit: Fenrir revives servants too. I'd rather fight Summer Alchemist again than go through this shit.