Due to her initial traits, she's still not exactly 'full power'
https://mangadex.org/chapter/47660ac9-4a10-4d21-a3a8-a08fb275d755/12
(mainly she can't see well + stat debuff from being in the sun)
Still proceed to kick their asses tho, with each of her attacks being lethal enough the healer couldn't save anyone she aims for.
The players still fight back, but with each actions she take, their numbers go down.
Before the panic set in, Wayne made the (correct) call that they need to keep rushing into melee range with her.
Since when they do, she use panic AoE on herself, hurting her in the process.
So if they keep this suicide waves going, they can whittle her down.
Rare heard that and decide 'ok, this 'leader' is too sm0rt, he dies NOW'