The Dior Dilemma

[William Cloud Hicklin]

presumably any union with half-elven offspring (noting that Mandos, the Gatekeeper watches the living and the dead) can, by way of Doom can access the equivalent of the descendants of Earendil and Elwing.....

...resumably, being Elwing's forebear [Dior] is well within right of claim of the Choice of the Peredhil.

Why would you say that? Manwe was very explicit as to who got the Choice. (Remember also, from the point of view of the Valar as well as the Elves, Men get the better deal: mortality is the Gift of Iluvatar to Men, a gift not even the Valar can take away.)

Also, what is this Doom you speak of? The only text I'm aware of where Tolkien talks of Doom almost as a force, is in Ulmo's conversation with Tuor in the long UT version: and there it is very clearly the Curse of Mandos upon the exiled Noldor he's talking about.