That skull is very impressive, you are becoming quite a sculptor. You really need to try your hand at a complete figure soon 

Sculpting is not a problem. I have no doubt at all that I could turn out passable looking 28mm figure sculpts. The problem at the moment is finding the right armatures...

Amazing stuff! Are those shields done with decals or are you just insanely good at freehanding tiny details? 
Thanks

As mentioned a little higher up the thread. The shileds on the last few figures are a mix of freehand and LBMS decals.
The standard bearer's shield has a decal on it, which I have overpainted and weathered quite a bit to blend the decal into the rest of the shield.
I remain agnostic about decals. For very detailed, intricate or tiny patterns, they are worth the effort for the result.
For block coloured shields or simple patterns with a few bashes and slashes here and there, I actually think it's quicker and more effective to paint your own.