I really hope Dirk being part of the fight means he’s going to employ the help of his robots against Lord Jack. I don’t know about Squarewave, but Sawtooth definitely packs a punch. He may even send him to help with one of the other fights.
But I also hope they use Zillywave and Sawhoo.
Given that they’re made with the same cherub magic that made the other legendary cherub weapons and Lord Jack is arguably infused with cherub power, they may have an advantage over him.
And I also hope Dirk finally uses his fancysantakind strife specibus.
And makes use of all the Zilly Santas they made too.
He could weaponize his entire sylladex with these things and just rap them out at LJ one after the other, like a silly zilly machine gun.