Who else could have aided Gondor?

[Inziladun]

Originally Posted by Faramir Jones

I always felt that Elrond could have at least sent Denethor regular intelligence reports, based on the information he picked up, even if he couldn't, like Rohan, send conventional military aid.

You mean after the Council of Elrond? Before then, Denethor didn't know much about Elrond or Imladris, beyond the names.

How would those reports have reached Denethor? And would they have been as useful and timely as what he gleaned from the palantir?