You could do some real small conversions on it that will make the model as a whole look better.
Using the terminator captain as a base (he already has robes anyway), convert his sword so the wings are replaced with a little angel holding a sword (like on the ravenwing landspeeder).
maybe paint a tattoo of the chapter symbol on one side of his face.
Maybe green stuff so the robes go all the way round his body as they are only on his front.
If you use a storm shield mould the deathwing symbol on top of it (it looks much better than painting it on).
You could mould some little wing on his shin coming off a deathwing sword (you will probably have to file off the eagle thats on there).
Hope this helps.
Using the terminator captain as a base (he already has robes anyway), convert his sword so the wings are replaced with a little angel holding a sword (like on the ravenwing landspeeder).
maybe paint a tattoo of the chapter symbol on one side of his face.
Maybe green stuff so the robes go all the way round his body as they are only on his front.
If you use a storm shield mould the deathwing symbol on top of it (it looks much better than painting it on).
You could mould some little wing on his shin coming off a deathwing sword (you will probably have to file off the eagle thats on there).
Hope this helps.