Rioters are gun skirmishers med-heavy lancers, use same values , but less ranged dmg, range is ok.
-Attack +10 (Proyectile +10)
-Defense +15
-Charge +5
Sassanid's Dmg and defense to +8 ,charge +10 proyectile +4
Since they came from what now is Iran maybe only mid-east empires + Crusader States can access them as mercs or at high lvl archer building.Unique mercs like gun elephants makes battles exciting (at least in MTW2).
People will sail the seas to conquer (or not) the lands around the ''recruitment area''. If they worth it. Thats why we need also to make random specific spots in the battlemap to requit the excepcional merc units (maybe the retrain option for elite mercs can be like 1-6 turns to retrain but...)
And maybe Tumurid faction can be abled to command?
Never tested B.C mod. good?