Queezle is most definitly dead, other wise Ffoukes would have summoned her again. Jabor was rent twain by the temporal forces unleashed on him by ramurtha, and Farqual was hit by a blast from the Staff of Gladstone. Any if your're wondering about the fact that Farqual survived the blast, check out what the blast did to Nayerean, whos an Afrit. Farqual is just a djinn, albiet a powerful one. I would resurrect Nat, the Queezle. Also I would ressurect farrar as then she would mope about the fact that she lost Nat to Kit, which would cause some wierd comic relief in a future Bartimeaus Book. And there will be one, as Johnathan Stroud himself said "expect to see more of Bartimaeus".
whew, that was a nice block of text
I am Tchue, I have razed citys with a single word, rent twain marids with wit alone. I am Tchue, deadier with words and wit than with Detonations and Spasms.