Well...It scarcely seems good to cut you out of something that was planned originally.
I just thought that it might be dangerous for Thorn to even try to contact Lachrandir at all, wanted as he is by Uldor. And yet...I, like Gwathagor, liked Elempi's idea.
Perhaps, Lalaith, Embla might attempt it and not get to Lachrandir. She coudl tell Tathren, or try to, anyway... I don't know.