How to beat Laxasia in ngplus

Question is the title, I don’t know why she is just overpowered in ngplus, I’m using the two dragon blade at level 152 and I have damage output as 154 but I still don’t do enough damage on her. Tried using the fire grindstone consumable for first phase and perfect parry grindstone for second phase and I always die on the second phase, heeeeeeelp