No interesting dodgable mechanics (rock throw, etc.) other than her broken-hitboxed fire breath. A one-hit-kill attack that, if it doesn't kill, it deals stupidly high damage magnitudes higher than any of her other attacks.
A bullet-sponge that goes beyond physical logic in a game trying to be realistic. After five tries (none of which I died to my own mishaps, no, she just decided to use her bite-grab on my two tanks one after the other, because that's good design) and seven sequential reloads due to clipping through the floor during her wing buffet, I don't even feel like playing the game as a whole anymore. In general, Flemeth's fight/some of the dragon fights in general are the epitome of 'cheap trial-and-error' or just the world in general.