i have been reading Fanula Papazoglu "Tribes of interior of Balkan Peninsula in times before roman conquest" , Interesting book concerning Triballi, Autariati, Dardanoi, Scordisci and Moesi. There is a nice description of few things we know of their armies.
Scordisci were famous for their cavalry; huge Scordisci army made entirely of horseman fought with Romans near Argo in Macedonia in 119. BC.
Dardanians were real thing; their armies were made entirely of disciplined heavy infantry fighting in close order; this is the weakness Macedonians used to defeat them, using light infantry and cavalry (wich Dardanians did not posses) to harass burdened retiring dardanian troops. Vegetius noted that Macedonians, Greeks and Dardanians used phalanxes.
Tribalians were mostly armed with spears and javelins, Phillip II thigh was pierced with λογχη. Alexanders expedition against Tibalii is described.
Autariati were true mercenaries that fought in army of Lysimach. There is no data of their equipment, but it is noted that they never leave behind their wounded comrades.
Q: I know that there are plans for Triballian unit, but are there more balkan tribes units planned?