After listening to the audio version, I re-read Final Crisis, Rogues Revenge & Superman Beyond, plus read some of the tie-ins for the first time.
– Superman Beyond is essential.
– Submit (Black Lightning/Tattooed Man) adds a lot by showing the personal impact of the event, plus fills in plot.
– Resist (Checkmate) broadens the scope but can be skipped. (I do like using the captive villain AIs as a way to get around the ALE’s control of communication channels)
Rogues Revenge was in the works before Final Crisis, and it shows. It still works as Rogues: Rebirth, but now I think the FC connections hurt more than they help.
Revelations is a much tighter story that weaves in and out of issues 2 & 3 (if not seamlessly), picking up the Crime Bible & Vandal Savage and showing the early stages of Darkseid’s takeover. I didn’t read it originally, but I’m glad I finally got around to it.
I didn’t re-read Requiem. I still haven’t picked up Rage of the Red Lanterns. (I’d forgotten the Alpha Lanterns were involved in Final Crisis.)
I also didn’t re-read Legion of Three Worlds, which IIRC has nothing to do with Final Crisis except Superman passes through it between Superman: Beyond and his return to Final Crisis when Braniac 5 shows him the Miracle Machine. (3 versions of the LSH, none of which were the one that I actually followed).
I do want to re-read Multiversity now, though.