Spoilers ahead! Fun fight, but tons of things can go wrong when aiming for no damage. The fire puddles left behind when she summons meteors can easily cause chip damage if you don't keep track of where they are while dodging her attacks. The unblockable dash punch can also be tricky to see coming; she can do it after dodging to the right or backwards, and from a neutral stance after certain moves. The guard break move on your shield can sometimes whiff too, so you always want to dash into her and mash L1 to make sure the move activates and connects. It's safest to stick to the Leviathan Axe since you'll need to throw it quickly to cancel her AOE bomb move, so if you use your other weapon, try to switch back to the axe immediately following a combo. Rage mode is best used as a “get out of jail free card” if you get guard broken or otherwise mess up, but you won't get much damage out of it and it can put you in a bad situation. It's best to deactivate it immediately after using it to save yourself from an attack.