It was really bad. She is one of the hardest bosses in the game. I guess sit was a good idea to grind. I did that and in some cases still died a lot. There is a really effective strategy to beating her and I didn't use it. Yes it is single but when she boosts you are done >.<. I am surprised you didn't have trouble with her but god I lost more than 1000 times. Kate and I.. in this case