I'll add a little more.
It's easiest to fight against Sylvan. There's a rain of arrows that will hit all stalkers and kill them, or you can deploy seven squads of five fairies, initiative higher, and they will all cast spells before the enemy.
Dwarves can fight with Armageddon themselves.
Necromancers can use Unholy Word to attack.
But in general, it's better to try fighting against Razazak with double new golems, a battle to the last, and Armageddon.
Auto-translated