Chapter 12 against the midboss. I died so many times until I switched Lightning for Snow, where it was a breeze because its really fast attacks all directed at Snow making it much easier to attack. The Umbra was helpful too, and if anyone is unsure whether to go for Umbra or Paladin for a Sentinel Snow, I would advise Umbra.

I'm generally unimpressed at Fang's Sentinel ability. :/ I will concede she's good, but Snow can be left alone and take so many more blows than Fang can.