I've also begun on the other four Ringwraiths. On them, I bulked out the flames first, and allowed the putty to set before moving on. I've only sculpted a couple of flames on each one, so that I don't interfere with the work while working... if that makes any sense.
Whilst doing this, I noted that they looked a lot better than the wraith I posted yesterday. I think the reason yesterday's wraith looked so poor is because of the height of the flames, and their distance apart. The fires on the others aren't as tall, and there's more closer together. They look significantly more natural. In an effort to fix the first one, I've tried to fill gaps between some of the fires, but there's only so much that can be done.
As can be seen, this one looks a lot better than the previous, even though he's far from done and most of the spikes are just cones of putty waiting to be covered later. It will take me several sessions spread across as many days to get them all finished.