
So I toyed about with your 1PP wings. I think they're better than any alternatives (so far). Erinyes should really look like evil elvish women with black hair and wings anyhow (here is one picture from Dragon magazine) and feathered ones at that (as opposed to succubi wings, which are batlike/demonlike). The only real issue is for those erinyes who use bows, which you've noted in your documentation. However, you did imply it's fixable, but either way I don't think it's all that much of an issue. You really only see a discrepancy from certain angles. Here is one screenshot where two bow-wielders face off, and I think it looks fine:

Now this second one you notice perhaps what you're talking about, where the bow of the erinyes on the right looks a bit odd. But I rotated them in various different angles and it is actually quite rare. It only happens when the winged one faces to the left, and then only at certain angles.

The one on the left is supposed to be a succubus, but feathered wings aren't really appropriate for her. Do you have screenshots of the NWN succubus? It would likely be better, but I'm not sure if a recoloured version would work for the erinyes, inasmuch as they're supposed to have feathered wings.