I think I died once to Specter Knight, Tinker Knight, Black Knight 2, one of the rando-bosses, and Kratos. Oddly enough, I never died to Polar Knight, who apparently gets hype on the Internet as one of the tougher ones. Everyone else died on the first attempt. (Which is not to say I'm super-awesome or anything, the boss challenges wrecked me, and I died plenty to the stages.)
Their damage is better, sure, but still not enough - maybe I will have to try NG+ after all, although that'll be after Plague & Specter Knight's campaigns.
Also, in the realm of other updates...
Devil Survivor 1
Finished Gin path, and finished the original Naoya / Kaido path and started its Day 8 that was added for the remake. Also made a stat topic! Which was comparatively easy after doing the DS2 stat topic. Check it out. (For all that it has the FF7/8 problem of "characters who can be equipped with brutally powerful skills in-game, but since everybody gets them, hard to parcel out fairly in the DL" issue.)
Anyway, the game feels like the endgame is just a tad short...? Maybe I shouldn't complain that they didn't pad it out with filler, but it doesn't feel quite as epic as it could. While it was *ludicrous*, DS2 has a second-to-last day where, with reality on the verge of blinking out, all the PCs decide to fight it out in some ego-measuring contest and ignore the presumed massive despair and riots and death in the background, then fight a last guardian who SURPRISE you knew before, then have a multi-part fight with the final which includes the obligatory shadow clones of yourself out to kill you. DS1 just says "yup, time to go kill the other demon lords, you win."
Gameplay-wise, there's something else I largely prefer about DS2 to DS1, although DS1's take is interesting: DS1 has much frailer bosses, but they often have some sort of regen-per-skirmish passive attached that restores 10% or 20% of their HP every fight. So if you're underlevel or not hitting the right element, you just aren't getting anywhere, and the boss gets free healing if they can snipe someone from out of range. OTOH, get the right slugger in the boss's face, and they die *fast*. This is a lot swingier than just giving the boss double HP but no regen.
Also... yeah, quite the difficulty spike on Day 7 that necessitates some grinding, for cash if nothing else because holy crap are both auctions & the compendium expensive in this game, especially late. Belzaboul in particular is a rude surprise; when I did Day 7 again, he wasn't SO bad (because I knew exactly what to save money for), but doing him blind without knowledge of the fight mechanics? Yowch.
(Gameplay spoilers if you didn't play it: if you kill 2 squads or attack the boss, all the other squads turn into evil flies, and the boss unlocks a new move, Spawn. All the flies have it, too. Spawn deals Almighty damage and, if you aren't defending, gives you the fly status. Which is horrible. Fly status activates really fast, pretty sure it's either "squad's next turn or Belzaboul's next turn, whichever comes first", and deals a bunch more Almighty damage (probably enough to kill you) and spawns a fly. If the squad leader was killed, it'll spawn flies for every member in the squad, i.e. 3 more. Oh, and it's a boss that has 6 Range and regens 10% health every skirmish, even ones where he's just sniping you from afar. The Flies are not THAT dangerous, except if they get even one turn, they're tagging your characters with more fly status. So... yeah, aggro the boss early and watch as you face 3 fly mobs rather than just 2, and if you don't have lots of status healing, you're going to die horribly and have your graves replaced by swarms of flies that finish off the survivors. You need to make sure that every squad can heal status, basically, to have a fighting shot at this fight.)
Anyway. Good times. I do like a lot of the cast of DS1 better than DS2's cast, especially the "minor" cast. DS1 seems to recognize that randos and non-joining-PCs exist much better than DS2, where they existed solely to die in cutscenes before the fight to prove the danger was real. We'll see how Naoya Day 8 goes...