The next stage is making a low res model based on the geometry of the high res one.
I thought it made sense to see how the baked normal map came out on part of the model before doing it all. Especially as Silo was choking on the scene and I had to divide it up anyway. The top image is the above model mapped with the normal map generated from the original sculpt. The tusks need a little work, but the rest is looking pretty good.