[X] Birdie No- Lumen, Creme, and Weiss's agreed-upon plan. They believe that, free, uninjured, and out of reach of most of the current lineup, the Nevermore is the greater threat, if not the more immediate one- everyone, right now, can go out there and punch the mystery Grimm in the snout if they want to- only two people can effectively hit the Nevermore in the current environment. An enemy that mostly can't be interacted with is significantly more dangerous than one that may have unknown capabilities. Ergo, it should be dealt with decisively- seal the Relics up for safekeeping, then let the Process pull off whatever it can do that was going to cremate you all, and, get this- don't be inside the temple when it does it. Take out the Nevermore, move back to that suspended tower, and deal with the mystery box there.
So Jaune isn't doing his Small Voice anymore then?
It kinda strikes me as 'We can't do write in options here' because Jaune demanded there be a democratic vote on how to kill our enemies, so we as player's can't just write up 'So we made the process build a tunnel for us and then turned it into a laser fortress to kill the bird and then launch explosive javelins at the regenerating dolphin horse Grimm monster.' Presumably this is also to help with the story writing speed, maybe Prok has some idea about how all three options shake out and doesn't want to have to deal with our SufficientCompetence vote that we craft all together that neatly solves all problems and covers future problems.
Aside from calling all scrolls with information, the Process Temple should probably have some loudspeakers blaring out a couple warnings, otherwise people are going to go blind until their aura fixes their eyes.