Fighting a Legendary and an Ancient at the same time on Master. Werewolves are hilariously strong, especially with Berserker Rage and the new rings from Dragonborn.
I'm using the 50% damage ring; my health is regenerating thanks to Force Without Effort, which... does that for some reason. I don't know why. The dragon fire didn't hurt me much because I have very high magic resistance thanks to Lord Stone, alteration perks and Agent of Mara.