Let's go, Rosmontis the cat. The moment I figured out (or more exactly, remembered) the timing for the stall, things became quite easy.

Rosmontis' S3 drops down 2 tacitical equipments that are immensely useful in blocking and baiting the Grudgebearers. The defense reduction is surprisingly viable enough to eliminate the Demolitionist too.

Music Used: Neko Hacker - Fly High feat. mochari Neko Hacker - Listen feat. をとは The songs are released freely with a permission clause for BGMs (!!!!): https://nekohacker.com/free-dl/ , and take this as an opportunity to start listening to Neko Hacker, their music is one of my favorites. I can talk about their music for hours with no end.