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Doesn't the Ring of the Wizard, which increases the duration of a spell by 50 rounds, have any effect on the force field? It still only lasts for 2 rounds, right?
:) Damn, it seems like a huge amount of mana is needed for such a battle?
A clone? That's water magic. I didn't have the water magic skill, but summoning a clone costs 24 mana. Is it really bad to get another 150 Harpies in the battle from 150 Harpies? And wouldn't it be great for you to double the 122 Eyes you have in the battle? ;)
True, the clone doesn't last until the end of the battle - it depends on the hero's magic power, but with the Ring of the Wizard + 50 rounds, it lasts longer.
Added 1 minute ago
Is it really bad to get another 150 Harpies in the battle from 150 Harpies?