All heroes units can have lighting effects similar to atlantean heroes it will help to standout hero unit from regular infantry.
Aif we can do that for all civs that would be nice. It can help make game more interesting and easily detect if there is a hero.
Especially for Greek who has 4 heroes having them in army with a special light effect or light casted onto them will make it easiest to detect.
This can help in battle as well to identify location of hero.
For egy just a light cast on Pharoah is enough