I don't remember the exact time – it's been a while since I played. But I hope to get to this mission in version 3.0 soon. Yesterday, I finished playing the 4th campaign.
I also tried for a long time to complete the 3rd mission as Raileigh on Hero difficulty. Then I easily completed it on Veteran. I clearly lack the skill to play on Hero difficulty. In 3.0, it became much more difficult than in 1.5.
Added after 23 hours 6 minutes
Question for those who have recently completed this mission on Hero difficulty or at least on Veteran. Preferably in versions 1.6 or 3.0.
Does Nicholas have a special ability? I'm just starting this campaign in version 3.0. I'm thinking about how to upgrade Faelan. Upgrading Empathy seems tempting. In combination with Chaos and Avenger, it's a powerful combination. However, if the Necromancer has a special ability, this combination can become deadly for the Empath himself.