Wait, 3 covenants? So, 1 for higher physical stat, 1 for higher magical. What are the requirements for the third one? And how did you get the Groundswell ability?
Also, could you tell me how to beat the cat? I already have the pin and but the fight is pretty brutal.
Groundswell is right at the start of this version, in a cave placed between two rocks in the Dust Devil area.
The third covenant is for beating the kitty.
The trick to beating the cat is healing items and understanding form change.
You will want to buy a lot of the 500 HP heal items from Iridia. And go into battle with Bat form. Slow her with the Bat skill then swap to the Basalt Elemental form. The rock skill she has is going to be where most of your damage comes from, with even a decent build it does either 500 or 1200 if it gets the second hit (usually it doesn't). She should only do around 300 damage a turn to this form. When slow runs out swap back to Bat and slow her again. This empties her turn gauge so you will have time to swap back and heal if necessary.
Just keep that up til she goes down, and you MUST have the hair pin or she will kill you at half health.
TLDR: Bat Harpy to Slow, Basalt Elemental to damage with rock attack and heal with 500 hp item.
Good Luck!