Resurrection of Haudh-En-Ndengin thread "Rivendell or Lothlorien"

[William Cloud Hicklin]

Originally Posted by Huinesoron

Imladris, though, is a realm of the Noldor and the Sindar, and it's led by the herald of Gil-Galad - Gil-Galad who led the alliance which brought Sauron down, and whose realm he was never actually able to conquer. Lindon faded due to emigration (and possibly loss of land at the fall of Numenor), not due to Sauron's actions. And in fact, Rivendell is still in active contact with Gil-Galad's successor at the Havens..

Moreover, Elrond had led a substantial wing of Gil-Galad's army in the First War of the Rings, had founded Rivendall as a redoubt in that war (which Sauron beseiged, unsuccessfully), and who sallied into the Mordor forces' rear as they were retreating before the Numenoreans, leading to a Pelennor-grade slaughter and rout. Rivendell also sent a substantial force under Glorfindel to the battle of Fornost where Angmar was destroyed and the Witch-King overthrown

So, yes, Sauron took Imladris very seriously.

However, a very great portion of Rivendell's people were Noldor; while this would make them more "potent," it's also the case that throughout the Third Age the Noldor had been drifting west to the Havens, so I imagine Rivendell had been bleeding population at a greater rate than Lorien.