Attack Luize
Heart/Dark (Heart/Ghost? Ghost/Fire?)
(Credit to the original artist, I'm assuming Blue made it for his hack but I have no idea.)
I propose that the stage 4 miniboss Attack Luize, firstly, should be heart/dark. Heart/Dark makes her immune to ghost attacks, however, she would now be even more deathly afraid of faith puppets, so perhaps a Ghost/Heart typing would be more ideal for her. I would imagine her form would be a more beefed up special attacker, however, keeping her defense stat somewhat high and keeping her stats up to 510. Perhaps something along the lines of:
HP: 75
ATK: 50
DEF: 95
SATK: 130
SDEF: 65
SPD: 95
Attack Luize would be a somewhat fast special attacker with good defense to keep psychical fighters at bay, though make sure to not have her equipped with psychical attacks and watch out for special attackers (I'd imagine she would get eaten up by Youmu/Youki/Elly/Etc., so there might need to be a typing change all together.) She would most likely retain her killer movesets, including signal beam and tri attack, and perhaps coupled with dark(ghost?) moves such as dream eater (shadow ball??).