"So we make it ten-on-one or something..."

"Of course, that still leaves the people on Endore stuck with him."

"You're not going to be able to convince everyone on Earth to evacuate."

"I'm aware."

"Blow up the planet with them on it?"

"We were thinking more 'evacuate them by force if necessary'."

"People can summon their own daeva to oppose you -"

"I know."

"It'd be a mess. Not to mention people who can't safely be evacuated, hospitals and so forth, people will run, people will panic..."

"I know."

"Can't imagine the demon would attack the planet full of human shields for his summoner."

"Why not?"

"....because it sounds like it wasn't that hard to find his summoner, and he's not going to find a hiding spot that people'd hesitate to destroy again so readily."

"That's a better answer than I was expecting."

"Thanks?"

"By which I mean that you might actually be right, which I wasn't expecting and is strategically relevant." She makes a pad of paper and scribbles some inscrutable symbols on it.

(Decrypted, the symbols record the entire conversation so far.)

"The aliens who summoned you seem unlikely to settle for 'blowing up Earth: not worth it'?"

"Depends on exactly how bad things are on Endore."

"A war is sad but probably not gonna have a billion casualties. I think that many people probably die if you try to forcibly evacuate Earth."

"The war is the bare minimum of what's going down on Endore."

"....what else might there be?"

"I don't know enough to guess details, but so far things he's done include 'toss an inhabited system's binary suns into a black hole' 'nonconsensually genetically engineer a new species sworn to him--and I mean swear very seriously, both the original species and the new one have a feature that makes promises very very binding--and we suspect he wiped out Lizard Kangaroo Species."

"Maybe if we had enough time to do an evac - built an exact replica of Earth somewhere..."

"You know what would be really convenient would be if we could split the earth in half with a scoop taken out of both halves containing the summoner and explosives, have enough demons and fairies and so on on the halves to keep everything habitable and stable, dispose of the scoop, make a new earth-bit, put everything back together again, and have fairies set it back on its correct course."

"...could computer model it but I'm pretty sure the splitting'd kill everyone - and the number of fairies you'd need - competent fairies -"