Mirror of darkness is a problem cause unlike the other two incarnations, it has no weakness,, so if you go in with a full nature and cold crew expecting it to be like the previous two, you suddenly find it now has a star resist in both cold and nature. It doesn't help that every other boss shadow basicly has the same resists as you fought it last time (think the only other change is the attack orb of the orbs of darkness now has a star resist in death.)
'c' and the orbs boss kinda also kinda requires you to know that the boss was capable of respawning themselfs. Komachi will ruin you if you didn't perpare (who thinks, let's make youmu equipped with a light crystal my tank for the F3 stairs boss fight.) the F12 stairs boss kinda required you to know it resists has changed from the last two fights with it, (right then monks at the ready and... what she resists nature now?).
I'll have to concede that the Mirror of Darkness probably can't be beaten blind but some of the others are still fairly doable.
'C' and the Orbs: You didn't need to know that they were capable of respawning themselves. You kill some of them, they respawn, and then you reevaluate your strategy mid battle. Not exactly hard at all.
Tenshi's fight is the same idea. You brought in a bunch of Nature damage, you notice she resists it. Nature can't be the only source of damage you have and so you can easily adjust mid battle for it. If it truly is the only source of damage you have, I have to question your team composition strategy. Even if you went in thinking, "She probably has the same resists as when I fought her the other time, meaning she doesn't resist Fire, Cold, Wind and Nature" You'd still have 3 other elements to effectively damage her. You wouldn't have access to the piercing properties of Iron Mountain Charge but it can't be hard to make do without it since you'd have come in already prepared to debuff her, considering what you saw during the last time you fought her.
Komachi's fight is another fair point however. Getting your tank Deathed towards the beginning of the fight is brutal. And since most people likely won't memorize the status resistances of their party members, they likely wouldn't be able to put someone who is naturally Death resistant in the front line to tank the hits.
That said, Komachi is the first major boss fight where you'll have access to a full party of 12 characters or very close to it so maybe the difficulty spike compared to 2F bosses is warranted. You can have a total of 14 characters by the time the Komachi fight rolls around.
It's safe to assume you'll likely only have 11 though, as Parsee requires you to have 12 to recruit her, Nitori requires you to craft 10 items which not everyone will have done, and Kasen requires you to have game over'd 12 times which is also something not everyone will have done.
If my memory serves right, Alice boss in LoT could not summon her dolls back, i forgot maribel (my bad),Bloody papa was invulnerable to magic moves (Bar piercing stuff like Rainbow danmaku/Eiki piercing move)
You're right, Alice and Maribel don't summon their minions back. But neither does Murakumo and you included him in your list of summon boss fights so that's why I included Alice and Maribel.
Again, Bloody Papa and the Hibachi Twins were not invulnerable. They just had Defense and Mind stats that were so high which made only Defense and Mind ignoring moves work against their "invulnerability" unless you grinded a ton. Eiki is a physical attacker and could damage Bloody Papa anyway.
Hibachi#2 and Bloody Papa had 1 million Mind while Hibachi#1 had 1 million Defense. They never were invulnerable since you could get the stats to over come such high numbers but they might as well have been invulnerable unless you wanted to grind for hours.
Oh then I guess it's 203 enemies in the game. Weird number I think.
Wow... that really IS a weird number. I kinda assumed my bestiary page was complete seeing as all that was left was the enhanced final boss and when i killed it in my other save file, I got the 200 bestiary achievement. Welp time to look at what I'm missing and possibly where.