Most got a basecoat of 1:1 Dark Greyblue/Black, but a few got Red Leather or Ochre Brown to represent warriors who'd rubbed clay into their hair. It looks a bit bright in the pics above, but the wash would dull that down.
Then applied the wash - I went with a 3:1 mix of Black and Burnt Umber. Those two steps took me the best part of 3 hours, but there were 224 figures to do.
With those two steps out of the way, it was time to split them into smaller groups for painting, mostly by figure pose or type:
|Command and slaves; some archers|
|The rest of the archers|