Well, she’s not “haha NP spam go brrrr” even among ST units (which already depend on facecards for their own NP recursion), but an already strong NP explodes that much further with her.
NP1 Maid (Alter) neutral everything, with 2x Skadi without Skadi’s DEF Down (+30-60% more ATK), nor Malter’s Coaching self-stack (which is another +30% Quick Up when Skadi-focused comps already swim in it let alone with Malter, so there’s some diminishing returns here), and 2K HNS/Tenkihime…
105,591-129,055 (117,323). Class adv, 211,181-258,111 (234,646).
Class adv, Coaching self-stack, 2x DEF Down: 344,539-421,103 (382,821).
And even in terms of facecards it’s not like she can’t put in good work their either. Any Skadi comp makes stars easily, and you still have Quick-specific crits. She’s an acceptable big nuke, if you can work around her mediocre at best NP generation.