Carissa seconds that; this is just what a loss scenario looks like, with the only remaining possibility being the fake escape plan. Keltham in fact picked up that they might've been making mistakes early on; they were making mistakes early on; they lose.
They should still try the fake escape plan, modified to be as tropey as possible, because a 5% or 10% chance is much better for Cheliax than nothing. But they should also probably be preparing to invade Osirion.
She feels sick, but not in a way that's very impairing.
The books from Tien have shown up. She orders them placed beneath the Rope Trick with a note Keltham can read, rather than interrupt him.