The Traitor Guard are the most numerous of the hostiles in Blackstone Fortress. The box comes with two sets of seven unique sculpts, for fourteen models altogether. Nothing else has more than four models. In the base game, they came appear in groups sizes from four to eight.
Traitor Guard (club) 
Traitor Guard (flamer) 
Traitor Guard (grenade) 
Traitor Guard (lasgun and bayonet) 
Traitor Guard (lasgun and combat knife) 
Traitor Guard Sergeant 
Traitor Guard (lunging)
In my first game (played with shamefully unpainted models) I ended up with three separate groups of Traitor Guard. And of course they immediately intermingled. I needed to do something to help keep them apart.
I counted up the frequency for each group size. The max size is 8, but 6 is quite frequent. I decided on two groups of loud colors (6 red and 4 blue), then a third group of more subtle color (grey). That way the greys could be used to bolster either group, or standalone, depending on the scenario.
