I note that you are planning African militia. I think this is a very good thing. Empress have an excellent range of Western forces but there is a serious shortage of non-Taliban opposition. I play Force on Force and there many scenarios where it is difficult to find the figures in 28mm.
Please make your figures compatible with Empress.
I think that there are great possibilities if you sculpt about eight figures with Soviet weapons (AKs and RPGs) and another eight with US weapons.
You can then add different heads (Soviet helmet, US Fritz helmet, baseball caps, berrets, arabic sheemagh, bare headed etc) to make sets of African militia, African regulars, Arab militia, South American regulars, "pro-Russians" etc etc.