Argh! I hate it when work interferes with my posting, lol.
Wow, Myth, that's some awesome information! It's always interesting to get an insiders point of view about a region. So, I'll take the Balkan area for Ubariya. I'm going to work my godly mojo and change things up a bit to suit her purposes. Hopefully it'll work out ok.
The name information about Heliasillyel is also really nice. I love that sort of thing. I'm always pulling a word from a foreign language dictionary and using it as a place name or character name but modified much like what you've done. SO I retract what I said earlier about a name not too elven. I'd rather you stayed in character and name it as Heliasillyel would name it.
I like the choice of Japan for Heliasillyel (though any number of places would work for any of us). The island is vaguely bow-shaped; I think it would be cool to emphasize that even more. Maybe include an arcing range of low, tree-covered mountains with your plateau at the center of the arc so that your city looks out over a sea of green forest bejeweled with meadows of amber grass. But also close enough that the occupants of the city can look out over shallow, sun-dappled, sapphire seas where golden spires of coral rise out of the water into fantastic palaces for elves of a more aquatic persuasion. (Yeah, I know coral doesn't really do that.) You definitely don't want an active volcano or Lavaria will be getting all up in your business.

As for food? Orchards! Or, maybe, sunfruit! Fast, fun,
and delicious. I don't imagine elves spend a lot of time in the kitchen; maybe you see it differently. Anyway, that's about it; use any or none of it as you like. Whatever you do I'll expect to eventually see some awesome names
Re: Duretep's Realm. Honestly it doesn't matter much where we put it; Frozen is going to be able to alter the surrounding area as he sees fit. FM, you can still do the stuff you mentioned earlier. In all fairness we should give FM a say in where he goes... You
could go back to your original idea of Russia.
Rathan, I can't think of any class that seems as appropriate as barbarian since you are already a spellcaster. I'm torn between options for Ubariya. I've been thinking a full-casting class and a full BAB class would be best mechanically but not necessarily best for who she is. Right now she is cleric 1 (though still subject to change). I've also considered druid, ranger, prestige ranger (for the future), cobra strike monk, and I think that's it. Any insight any of you can provide would definitely be welcome!
Theroc, My understanding is that HM would have us advance in two different classes whenever we gain a level and it would work just like multi-classing except we gain two levels at once. Gestalt works a little differently in that when we gained a level we would get two classes but only take the best features of both classes.