Sanctuary – “Life in death and death in life” [Campaign 4 – Mission 4]

Light elementals have a better counterattack. They deal much more damage with their stack against the enemy.

That's true, but in my tactic, the main goal is to hold out for one or two rounds, and water is better at that. After that, when the stone skin and regeneration are active on the earth elementals, nothing is scary anymore; you can summon light elementals, or use the aura of retribution, and the enemies will still die on their own.

By the way, I just took a castle from Inferno. The enemy hero was deadly, and as a result, I only lost 17 Pearl Maidens, and that was only because he killed them with spells at the beginning of the battle, and I had nothing to resurrect the fallen corpses with.