How many groups of units you wish to have under control?

[MARIAN]

2 - Commander is worried about the game performance; with many units will not have a overload of PC resources?

Not so strongly

3 - Harald suggest no set a number limit, because in this mode also with high money level the armies with no-elite units will have the possibility to use the numeric superiority against elite only armiies

Having 45000 you will not type more than 40 groups, from here is limit

4 - Someone (me too) is worried about the battle interface; with many units the game icons cover a good part of battlefield. A HUD restyle will be necessary (overall for no limits possibility)

It can be solved simple pressing of the button Alt+M

5 - Britannicus suggest a HUD like Men of War style with the laterial icons and scrolling.

I too offered scrolling for 17" monitors