Invasion

Battle with Duncan I could have avoided losing a single unit, but I was already too lazy. Can someone explain why he was sending Berserkers against his own Griffons? Give a fool darkness, as they say... Hero skills: Battle to the Last, Darkness, Fire Arrows, Storm Wind, and Machines. Equipment: Lion Set, Marquel's Skull, Armor of the Forgotten Hero, Ring of Swiftness, Ring of Affinity with Machines, Staff of the Underworld, Dragon Shield. Basically, the entire map can be cleared with just Demons. IMHO, the Regeneration spell is severely underrated. I played leisurely and it only took 131 days to explore the entire map. 2562 points and Thunderstorm.
I didn't see any mixed units in the enemy heroes, everything was according to their race.
In the original campaign, Frida, upon learning of Godric's death, unleashed divine retribution on Laslo - why isn't there anything like that in this scenario after Duncan's death?