She isn't as good as most people say. She is too squishy and needs help to survive.

You just need to treat her like a Fuguki (since she is basically... an immune fuguki), so pair her with people who can support her. AF, SB Kurenai, healers can help you sustain her.

Remember that her chase will damage her and this means that even if she isn't hit as much as possible, you still lose at least 1 extra round of CD every turn.