Build: https://imgur.com/a/RN2ck
The idea with the moving squads is not bad; a couple of times these guys popped up very inconveniently right when the enemy was on my tail, although they are cleared without any problems—inquisitors and demonesses mainly due to defense from bone warriors, and paladins because of their own stupidity related to one of the Chaos perks :)
Overall, I liked the map; of course, compared to the author's previous works it's not as epic, but in my opinion, it's just right for an opening Campaigns map.
And a couple of questions—this passage https://imgur.com/a/jt8nO was intended this way, right? There is no other way through, but this hole looks strange. And one more thing—Markel is now the chosen of Ashan and has been to the very core of Ashan; maybe give him a cooler special ability that affects the course of battle? Something like Arantir's avatars? Because in both previous campaigns, breakthroughs were essentially always built around the ГГ special ability, but here it feels like we're playing as an ordinary necromancer