Ooo I like it ~ so how is she so far?
So, updated thoughts on diamond Poltergust now that I have her at level 41 and 14.8 FP.
(This feels too long, but OOOOH WELLLL)
Overall I'd say she's actually really good, but has to be used with the right team against the right team. I'd forgotten that her second SA refills her blockbuster meter when her own buffs expire too. This makes her great when teamed with Surgeon General, especially with Trauma Center, and makes Squiggly's taunt potentially really useful too.
With enough buffs present to expire and fill up her meter, I found her capable of dealing enough damage to be part of a successful team into the low 40s in prize fight streaks.
She seems to shine best against some of the most annoying teams too. Resonant Evil, Untouchable Peacock, Armed Forces Cerebella, Valentines with either of their Marquee abilities. If both teams have Surgeon General, that can be +100% blockbuster every 30 seconds! She works against Bloodbath Eliza too, though in high level prize fights it's a bit touch and go if you don't have Surgeon General to back you up. Otherwise, the good news is that you can't have more than 5 bleeds on you at one time!
But her usefulness is highly dependent on her team and who she's up against. After doing great with her prize fights I was surprised to have her face plant again and again in Accursed Experiments when I was trying to use her to level up some other characters. Without Surgeon General* to back her up, and against foes that don't have buffs that expire regularly, she's pretty lackluster.
*She might also work with some of the "apply buffs on tag in" characters if you tag in/out enough, but I don't have experience with this.