I’m glad to have provided some assistance. A while ago, I tried to make Apocalypse frames using the same sheet, but only got so far. I have below posted all my frames as pngs files. I hope it helps you to get started on your fix. I should also mention that if you are looking for more help in fixing the Apocalypse spell, I would take a look at MisakaMikoto Apocalypse port to fe7 JP. I will link it below my frames. I hope you find this information useful.
My Attempted Apocalypse Frames
https://feuniverse.us/t/import-apocalypse-animation-to-fe7j/2121