I'm glad that you agree with me. Parsee wrecks that blade like it's nothing, what with her Dark element nuke(which is easy to set up thanks to the fact that the sword can be hit with Terror easily, which weakens it further), her "powerup for everyone who's with debuffs" passive on, as well as her Dark damage boost. And the sword's debuffed too, so it's weakened even more. I also want to believe that she's on Gambler, because if she isn't, then that's seriously broken worse than with Flandre, and you get her much sooner and with no tough fight or requirements beyond "get 12 people into your party". Parsee's niche, to be sure, but when said niche is up, she wrecks, period.
Yes. If you have someone who can consistently-land Terror, Parsee's a goddamn murdermachine because you can just bounce between Terror skill+JoKaL.
And this is why Kogasa and Parsee are a duet to consider when wanting to wreck the sword, because Kogasa can land the ailment even more easily thanks to Sheer Force, so Parsee can keep on wrecking. Also, I do believe that the wrecking strategy requires the power of Hina, as Parsee becomes stronger when people are debuffed, and a debuffed Hina is a happy Hina, so...
In other news, I grinded on the 20F Mirror to get the rare drop, and... I have no idea who to put it on. I mean, my mindset isn't focused on the ATK/MAG boost on it, but it's SPD boost, as it's the best SPD boosting item that I actually have. All in all, I feel that this should be something that replaces a Meteor Drive for most characters or maybe a Wash Basin Set for a glass cannon(at this point, Flandre could use it to amp her everything in terms of spell cards).
As for how I could do so, I ended up using Nitori with the Monk's Iron Mountain Charge and her Overheating and Cooling Down skills to give her increased power and the ability to restore her MP to full with a Earthin Orb equipped(note that Maintenance turn it into a +4 MP regen rate boost, meaning that you get 12 MP per concentrate, and that's before adding one level of Cooling Down, which doubles that to 24 MP, 4 more than her max MP at the time), thus turning her into a serious powerhouse against the Mirror. Ran, by comparison could barely dent the damn thing, and that's when I buffed her up a bit. Bottom line is that Ran is better for floor trash than boss battles with her attack spells, and I still needed to bring in Reimu for group heals, because something that throws several party wide attacks is kind of nuts. I also brought in Parsee as a Strategist Mind tank and I did not regret it, she was immune to everything the boss could throw at her, and the main reason that I had her over Komachi as a tank was the need for the ability to Silence the Mirror, which was very helpful when the ailment was inflicted on it, as it let me not die from it's magic. I also stand by my Enchanter Aya and her ability to throw every kind of buff that she could, starting with SPD, as it lets me make my allies faster, and thus able to do more quite easily(I also was able to use the ATK buff for the sake of powering up Nitori, speeding up the fight a great deal).
Oddly enough, I find myself having no need for the "superhuman buffer monk" as Sanae, Aya and Reimu are all enough to manage my needs in terms of buffs. I may want to sacrifice a level in Expansion of Consciousness to get Ran's specialty up and running, as an Enchanter Ran would be most helpful if I can set her up in time for the final boss(or at least the Magatama, as someone who can heal everyone including the reserve would be helpful in getting everyone healed up and up to snuff against it, especially if I want it's rare drop, which IS useful for ATK and DEF based fighters).