Heroes 5.5 WarGame Edition - Tactical Edition.

Ideally, you need Darkness to counter it, but if the player doesn't take it... how does this mod change the balance on the map?

It's hard to say, because, as I mentioned before, most of the changes related to gameplay on the map are still in the project and haven't been implemented yet. When the mod for gameplay on the map is released, I will definitely announce it in the thread.
I'm not rushing the release because I prefer well-thought-out work and balancing, in conjunction with other numerous and systemic changes, rather than just releasing raw, isolated changes and hoping for the best, like, here's a perk - try it out!

Guys, is it possible to create a script for a standard bearer for 5 heroes? I think there are a couple of skilled people here! I'm really asking, I'm begging! This is (for me) one of the best features in the game, if not the best (unlike overpowered commanders). I don't even know if I should ask someone for money... Hasn't this feature caught anyone's attention, or is it very difficult (impossible) for 5 heroes?

Specifically, what are they, from a gameplay perspective, and what are they for?