Guy, if you have a plan, please share with the class.
Okay. We may not be trying to destroy Kikuri, but we're going to need a lot of power to defeat her. That's why we're gathering people, right? We've got KOnngara right now, and Yuugi will most likely assist, as well. If we can get to Suika, she'll probably also assist. And Lumia would be another powerful ally, although as discussed earlier, she's likely to betray us once the battle is over. But with everyone else, we can deal with her; in fact, it may be best to have her go in first, then come in with everyone else once either she or Kikuri goes down. I'd think it's more likely that Lumia will go down firrst, at which point we come in and finish the battle with Kikuri. If Lumia wins, we charge in and take her down before she can kill Kikuri (of course, that assumes she's willing to help at all. If she's not, we'll just take her down right now).
As for Cirno and the other fairies, well, Cirno's gotten pretty strong, right? So she'd be another good ally. The other fairies wouldn't be there to fight. Konngara said that Kikuri can use the moon to attack, right? And we're going to have to go inside it to get to her, right? And even if not, we'll at least have to be on it. That's why I asked about Yukari gapping her away from the moon, but if that doesn't work, that's where the fairies come in. Being with Konngara may keep us safe during the approach, but once we get there, we'll have to worry about attack from all sides. The fairies would assume a spherical formation around everyone else; they're expendable (and they resurrect), and would be there basically as meat shields (although we probably wouldn't want to tell them that part; we'd just say that's the formation we want, and tell them to enclose the rest of us and Kikuri and fire at Kikuri whenever they have a shot; sure, friendly fire is likely, but they're fairies. It wouldn't do much). Kind of mean, I know, but the fairies'll come back, and I'm thinking we'll need every edge we can get against Kikuri.