Yes correct...
Scutati and promachoi (front line heavier scutati) can be common through out the entire empire.
Scutati can start with no armor and have leather cuirasses and have finall chain mail (short) upgrade.
Each upgrade can use one shield pattern that will be different from the other.
Promachoi must start with long chain mails and have an upgrade with scale cuirasses.
Again each upgrade can use one shield pattern.
That way all 5 versions , placed side by side will give the impression of differend bandums.