1/2 scale
You could use the same frontages but only have a single rank, either using some sort of counters, or a roster, to keep track of casualties. In a pinch your troops would still be compatable with those of other players, which is an advantage not to be sneezed at.
It would also somewhat ease the problem that wargame units occupy a historically disproportionate depth.
On the other hand, it wouldn't look as good. But that's your decision.
Yours,
James D. Gray