First of all these Survivor mini's can also be used for a gangwar skirmish type game (necromunda like), or as insurgents. even as African militia in bush war game.
So I would say do a mixed set with aditional equipment. for instance some european fire arms (G3,Dragunov,Fal,Fmas, Mp 5 with and without SD10 's) perhaps a Law , a Axe and a sledgehamer. and one or two drumfed Tommygun's . and some Baliclava heads and some with 1930's style hat's.