12 units out of which 4 are sacred, 10 commanders - sounds like a lot.
I personally like the idea of 4 graphic styles, the units will look more distinquishable. When I create them allown, the units tent to look to similar, making it look boring.
I take one element...
Fire sounds easy, earth looks manageable, too. Air ... is it possible to copy the "fly when blessed effect from Mictlan eagle warriors? ... But Water ... Oh, maybe something amphibious...
I think I take earth.
