I made some minor adjustments to each of the color schemes. Archetype I (brown shell) got some Bubonic Brown highlights to accent its other wise bland look and feel. Archetype II (green shell) got some Skull White dry brushing on the fleshy bitz and some more Devlan Mud shading on the shell. I believe the addition of more Devlan Mud wash to the green shell would resolve any issues of it being too bright on larger models. All hail the Devlan Mud.
Once the new codex hits I’m going to start my personal Iron Painter challenge so I think this is as far as I’ll take either scheme. Now all I have to do is make a decision which one I like best.