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Yes, the Reaper also helped me a lot :).
Ogres are also extremely effective against Haas's troops. If they also had the "heavy club" ability from PM, the dragons would fall one after another :). I'm just shedding tears of joy when 18 ogres, using their rage, critically hit and kill an entire squad of 9 red dragons :).
I think that against Haas, you need to take such an armada: ogres, Black Dragons, Colossal Dragons, Imperial Dragons, and White Dragons from the "Army of Light". Dragons against dragons :).
By the way, Haas is afraid of knights because they have the "dragon slayer" ability :D. And Haas is also kind of a dragon :).
By the way, in my battle, Haas charged cavalry. It's much worse if he suddenly casts "Hypno-Z" on the shamans. Therefore, in a battle with him, you need to use level 5 troops.