Hi Vin,
It's a good question.
The Archivematica docs cover what you need to do fairly well, and that might be enough for some folks:
here.
Two other examples I like on the forum are:
Disabling FITS itself should be easy enough too. You would just navigate to "Preservation planning" -> Commands (under characterization) -> Disable (next to FITS)
And then follow the prompts. This will disable it for all file formats.
I'd be curious to hear the rationale for swapping in DROID as some of that output should be covered by Siegfried or FIDO. But it sounds interesting. We look forward to hearing how your investigations go and best of luck!
Ross