The extreme and the Economy.

[Parkev]

Or just go real time with a pause button. Disregarding possibly funtional limits of the hardware.

[LorDBulA]

Or just go real time with a pause button.

This is also not the best solution.
Can you imagine fighting war as seleucids both with Bactria and Ptolemies?
With intensive fighting, many armies trying to take advantage of terrain on both ends of the empire in real time would be nightmare.

The best Idea is mentioned by blacksnail. But it would require extremely good AI.

[blacksnail]

Or just go real time with a pause button. Disregarding possibly funtional limits of the hardware.

The functional limits are of the human brain, in such a case.