Would've done this sooner but I didn't have my usual computer with me. As for the boss fight, it's not my favourite house guard because I'm not the biggest fan of the pris burn gimmick, but it's still a decent challenge nonetheless. I didn't really do anything too fancy to beat him, it's mostly gather neko charges and then rip into his health with cataclysm + morningstar.
Also this boss counters me by preventing me to draw mana from the healing branch, but fortunately I remembered I have the azamay egg misc to draw mana from instead.
Music used:
Arknights OST - Martyr/Guiding Ahead Boss Battle Theme