well, in epic levels it wouldn't really be much of a concern, as one could take the elemental resistance feats, but being that its a lvl 20 server such is simply not possible. . . well. . .not with out cheating per say.
I know on some other servers i once had ellana on, she was a fighter/cleric/harper and took fire resistance, as she was a priestess of sirrion. But trying to replicate such here is not very possible. Though I would love to have her as she truely is, harper will most likely never be seen on the server (though a harper is really more like a good version of the vardo from what i have seen), and she will never be as good a cleric with the way she is on ravenloft. She had a cold weakness, and it was rped out to the fullest, just as when ever Atlantia is taken out into very cold area's , she will most likely whine and cry about it the entire time.
The minor elemental resistances are available however, allowing 5/- resistance, which i believe does stack with gear. Some times it does wonders, but that is usually against things like the fire monsters in the dungeons below the dwarven city, as far as the cold, i haven't really noticed much help. Still take 15-30 dmg form cold when failing the dc check. Its a good way to keep my sorc out of the mountains.