Yeah, like Foot said, the fact is that the game is molded for historical accuracy. And it is historical innacurate to have an army of the elite class (For example the Iberian elite) which supposedly would be too few to reach an army size. Armies always relied on lower quality soldiers to fill the bridge of numbers, which could not be reached with an elite (The very name answers the question. They are the elite. They are the chosen few.) leadership of tribes. Even if we take off the social and/or financial status needed for an individual to belong to an elite unit, the elite units usually underwent through intense training moreso than ordinary soldiers, and many of those elite soldiers already came from backgrounds of famillies adapted to fighting, so they were familiar with the whole concept and practice since children. However, trying to mold a Punic artisan in his 30's who never knew other trade than his own, into a Sacred Band (As per your arithmetic calculation 10 train 100, which 1000 which train 10000 with train the entire male population of Carthage into Sacred Band infantry,) is simply realisticly impossible, as most people in Carthage would fail to adapt to the standards which made the Sacred Band an elite unit. The degree of elan and discipline maintained by such units are elite (Meaning, they are not normal). Thus once again, you cannot shape a village idiot into a Sacred Band terminator, no matter how many mnai you throw at him.

In such a case, we'd have modern armies solely composed of Commandos and Special Brigade units.

The concept is unfortunatly for you, too unrealistic and out of touch with reality to be implemented by EB II.