I'm currently making a desert camo Elysian army too, and I'm using
GW Desert Yellow for the fatigues and Astronomicon Grey for the armour-y bits (the pads, helmet and chest flak jacket). It looks nice and I enjoy painting it. I'll usually do a Magic Devlan Mud wash over the whole model (except the face) to darken everything and provide some shading. Seriously, Devlan Mud is the best.
I only have 3 of my squad of 10 done so far, but here's a pic of the 3 guys I have done.