"Escape to Salvation" - "Magnificent Retreat" [Campaign 4, Mission 4]

What's the point of a replay? The hero casts random spells, then the dwarven troops arrive and simply one-shot everything. There's no tactics or strategy. Campaign replays might be interesting only if they show overcoming seemingly impossible odds, like defeating the yellow castle near Arantir or defending the second city for Kujin in her first mission.