Damn that fanfiction - I've finally finished writing that scene I was stuck at, but I gave myself a major case of the feels in the process.
I'm as guilty of overusing the spirit guide vision trope as everyone else, so I thought it was about time for a twist.
As a result, Kaworu and Rei don't really have any more of a clue how to fix things than anybody else does; They just know it's theoretically possible to break the loop and hope that Shinji can do it - When he calls them out on this in his usual frustrated/bratty/its-not-fair manner and accuses them of just demanding impossible things from him the way that Misato and Gendo do in his subjective present, they turn out to be just as close to their breaking point as he is and get all emotional on him and basically start apologizing for the events of EoE and Q & displaying signs their obvious fondness for him, leaving this version of Shinji - who hasn't even met Kaworu, for one thing, and is suspiciously incapable or unwilling to remember or conclude what exactly caused Third Impact in earlier timelines - rather perplexed and vaguely guilty;
He's on his own and it was only his tendency to want to be "guided" or "saved" that led him to assume someone has the answers.
Basically: "The silver youths before him may have been alike to demigods, but hat also made them demi-human"
(The idea that this means they're in the same boat and should join forces in a more equal fashion, albeit overlooking different realms of action, will occur to him later after some Angel-slaying and an inspirational talk with PresentDay!Misato, but he's not there yet and at my current pace I may not get to that scene in months ^^°)
And I know an eighteenth charm, and that charm is the greatest of all, and that charm I can tell to no man, for a secret that no one knows but you is the most powerful secret there can ever be.