Garret: the reason why no one write about it is that there isn't any problem with Viconia's romance, at least I don't think there are. As Astafas said, half-orc can romance viconia, but you need the bugfix from
Baldurdash.
As for the dialogues, listen to what she say, try to be understanding. You also get a few items in the end, but they aren't that good.
Note: Do not sleep with her the third time (yes, the "third" time). Her romance end similarly to Aerie, in the way that she'll leave the party, also - like Aerie's - you can make her stay, tell her that you need her for your quest...