I'd wondered, but I didn't think about it that much, and I still can't come up with anything which seems likely, is particularly problematic, and can be dealt with without compromising performance in other scenarios. If we assume no decoys, unknown enemies or spells, then I can't come up with anything better than @kelllogo and @Tirfarthuan. If it's a decoy, then it's a very good one, and we need to poke it anyway—and I'm not sure where the real one would be. Roof/on top of the wall, ready to snipe? If we assume that unknown spells are in play, she could have a defensive buff that lets her survive, or Spell Reflect would make sense, or an Interception buff, or a brand-craft array doing something, or a readied teleport, or something else. Hidden enemies could mean all sorts of things—maybe she kept singing when we entered in order to buff some concealed ranged attackers, or maybe she was distracting us while the melee guys sneak up on us, or there's another MG in which case anything is possible. The fact that she kept singing when we entered is definitely suspicious, but I don't know what she was using it for, since the update did say that all known enemies are unbuffed.
Many of these are taken care of by Just Do It—Core Purge is hard to block (aura effect, not a Spell or projectile, not a element that's easy to block), would hit concealed enemies (I think—I forget precisely how it interacts with cover) unless they're too far away, and does enough damage (59025) to break through weaker defenses, and the Starshine follow-up will deal with some other possibilities. There are still potential problems, but I don't see how to deal with them without incurring extra risk.
Actually, there is one modification that would deal with some potential issues—do the Starshine regardless of Grey's condition, and also use it to implement my plan 4, destroying the platform she's standing on (and probably some of the other cover in the room—particularly the far half—just in case). We could also deal with distant enemies by moving around while Core Purge is active—and probably should—but that being dangerous may be more likely than ranged enemies surviving the Starshine.
@ltmauve, @ReaperofInterest, @kitsune9, @Crimson Soul, @Makuta, @victor janus, @Helibeb, @Mellithae, @random_npc —you voted for the plan, what do you think of modifying it like that?
You need a space after the comma.
