I think I like this solatair rule
first put 6 D6s around the table of a color, but make sure there all differrent number eg 1,2,3,4,5,6
now roll a D10 dice and put enemy at the corresponding location
do this procedure for every enemy unit that can move.
use a D10 and let everying over 6 remain where it is.
its simple but had to be said, because it kinda works well