The most challenging campaign.

I haven't completed all the game campaigns and missions yet, but at this stage: 1. In the original Heroes, I'm playing as the "Cultist". The third mission for the Necromancer faction seemed difficult (I spent a lot of time on it...). And this Cultist is also challenging – I can't pass it yet. What will happen next? Maybe it will be even harder... If I manage to complete the Cultist campaign. 2. Hammers of Fate – the "Resolution" campaign is difficult, and I'm stuck there for now... I completed the rest of the campaigns easily. 3. Tribes of the East. So far, nothing seems too difficult. I've reached the second campaign, second mission, and I'm playing as Kujin.