Alright nobody has actually given me a better idea than Chandra as a finisher to replace Arcavios / Founding / etc
This is what I'm currently looking at for the completed list, I think it should be able to reasonably cycle through the deck but I'm a bit worried thundertraps can't find marangs, so you HAVE to chain them to find stock ups to find marangs. Is there any other cantrip dork worth considering?

and yes you could technically just bounce their whole board, keep 4x marangs + kona and have 2-4 counterspells in hand and pass. But there are so many ways it can go wrong and it takes 10x the time