The relationships should be immediately obvious, anything connected with a line vertically is a dependency. Grouped theaters at the bottom simply all use the same dependency (it should be immediately obvious how/why). Gold and Indigo colors help separate out the modes.

base_common_ammo and default_gear have "test" alternatives which are used by different groups.
I made the diagram for my own use as I'm learning the theater system. Hopefully it helps save you a headache!

It seems like it may be possible to combine every theater file into a single file, so knowing which dependencies are necessary could potentially be useful for that as well!