[Imp]

As far as I can tell you only really need these saves
Deploy - which is really signifying the end of the last battle.

I then manually save the first turn right at the start before moving anything if I remember. Just for the GIF animation so has deploy. Autosave is fine if forget at end of turn 1

Those are the only important ones I think rest just provide detail.

I just use the autosave so the saves are consistent for the GIF as always at the same time in the turn.
I only use every other turn for the GIF to reduce file size.