The original wave is actually possible with a mini ship (on 60 hertz, for all I know). Just search up “cataclysm last ship”, it’s a level by “Seturan”.
Noice! This lvl is the definition of easier than it looks, when my hardest was deadlocked, I beat this as my tenth demon and assumed it was very hard cuz of the speed changes and stuff and i beat it in like an hour lol.