Exactly. I've never watched a movie or tv show and thought, "If only this was shot at a higher resolution."
I don't mean to seem disrespectful, but I honestly don't know why people still want Magic Lantern. There are so many cheap cameras that have great quality video/ specs these days that it seems crazy to opt for an unstable software in what is presumably a vital tool that is making you money.
Shoot in 1080p, and take the time to get it right in-camera.
"How would you tell the story of the wedding?"
I don't think there's any 1 way to do it. I see lots of wedding pros that have very different styles when it comes to their final edit, specifically what they include or exclude, and they can all be amazing. My advice would be to capture lots of natural audio throughout the day, make sure you get great clean audio for ceremony & speeches, and then look for the "in-between" moments with your couple: the glances, smiles, hand holding etc. Then when you edit it later, pull out the parts of the ceremony & speeches that are personal, and layer it with those special moments you captured.
Watching lots of wedding films from top-level pros will also give you some great ideas.
"crop dusting TAI fighter"
I didn't see anywhere if you mentioned what you'd be filming. Are you doing documentaries, short films, weddings, commercials, etc?