Added 3 minutes later
I say to Her: -First, you and your bear squad will pass unnoticed and dispel the illusion. Then, the remaining squads that will follow us, maintaining distance and remaining undetected, will attack the demons from the rear along with us. We will have to break through to the gates and open them for Verdan's squad (but we can also have the priests cast something like a battering ram and break down the gates from a distance, then we can attack the demons from the rear, and Verdan will attack from the front - this is more effective). And then we will attack the demons with our entire army and crush them.