And the law ending is about as creepy as I was expecting.
I had to fight Jimenez, of course; he turned into a giant demon for the occasion. The fight wasn't too terribly bad, but I was really overleveled, plus I had Demiurge and (I think) Shiva in my party. I did find it somewhat galling talking to angels and fellow crew alike in Horologium afterwards only to hear over and over about how it was right and just of me to kill him because he was nothing more than a demon and his soul was impure etc. etc. ad nauseum. (It occurs to me that this might stem in part from being raised conservative Christian and really growing to hate that sort of rhetoric, but I digress.) At any rate, the Jimenez fight was over relatively quickly. He wasn't the final boss, though; that honor went to Mem Aleph, again.
Once that fight was over with, I finished mapping Horologium so I could supply map data to the Dantalian on the top floor of Eridanus. It turned out later that I'd missed one tile on Horologium's sixth floor, and the "normal" version of the phase shift area on Eridanus 2F. I actually resorted to looking at maps of the two areas to see what I'd missed; normally, I wouldn't have bothered but on my third playthrough mapping was starting to get dull, and I mapped the floors without doing so during my other saves anyway and so just didn't feel like repeating myself. It is worth it, though, since the Dantalian will give you five of each kind of stat incense if you complete all the maps in the game.
(Incidentally, if you talk to Dent after finishing all the crew EX missions, he mentions that Mia, Gekko, Tanaka and Anthony are very grateful for what you've done for them and are singing your praises. The thought of brainwashed!Anthony was actually quite upsetting given the growth he'd been through in his last two EX Missions in particular. At least you don't talk to him directly the way you do brainwashed!Irving, who remains exceedingly creepy. In the chaos route, Dent just mentions Gekko and Tanaka, and I think they leave the ship to explore or something.)
Eventually, I got Enemy Search C and promptly went back to sector Grus to take on Demiurge. It wasn't as easy as last time, as some of my demons were at a lower level and/or really not suited to the fight. It still wasn't too bad for me, but the demons didn't have the easiest time, and I ended up using more MP-restoring Great Chakras than I would have liked. I also did the flipside to the Mara EX mission from last game (in which you had to fight Seraph for Mara), this time fighting Mara for Seraph, the latter of whom joins the party if you have space (as does Demiurge, normally, but as I already had Demiurge in my party, he just commented favorably about this development and left). And then... more demon fusion!
I redid a lot of demons - Trumpeter, for one, and Mother Harlot especially; the latter now has Victory Cry, which completely replenishes a demon's HP and MP right after a random encounter. I've also since redone Demonee-Ho, although I opted to give him skills that protect him from Curse and Expel attacks, which unfortunately resulted in him losing some good attack skills. He does have Victory Cry now, though, and in any case I was sick of him getting instakilled all the time. (Demonee-ho is something of a disappointment in that respect, at least compared with Frost Ace, who is immune to Expel attacks and only needs to be protected from Curse. And Demonee-Ho is some forty-one levels above Frost Ace.) I might try tweaking Black Frost and King Frost's skill sets next game; I'm not sure yet.
The final battle with Mem Aleph went roughly as expected; I went in with Shiva, Demiurge, and Mother Harlot, and ended up hitting her with Jihad/Babylon Goblet over and over. Sadly, she didn't get charmed this time, but it didn't really matter in the end.
Mastema meets you at the Vanishing Point afterwards; he's ecstatic, of course ("Gloria! Gloria!") and mentions that now they have all the keys to remake the world - including Zelenin and her hymn. He leaves and, as with chaos, you stand there helmetless and throw the cosmic eggs into the Vanishing Point. After the credits, you get to see what you've wrought, which is basically the remaining population of the world (those who "clung to greed" were "returned to shapelessness," which was pretty chilling, I thought) standing on the tops of skyscrapers endlessly praising God, with Zelenin in the center, "reborn" as a gigantic pillar who will live eternally, singing hymns of praise to God. It's creepy and not a little sad.
I forgot to record my ending stats, but at level 99 my protagonist had strength around 73, luck around 72, magic and agility in the mid to high 60s, and vitality bringing up the rear in the high 40s/low to mid 50s. Since the game shows them in the order strength-magic-vitality-agility-luck, the display was very symmetrical. My suit was luck-based this time.