[apoger]

>I don't think that you can kill 600 troops with a single MW. As Alex said, it can only kill 20%-40% of an army. If your enemy has a 2000 units army, Mw won't help you.

A single MW or FFTS will kill very close to 20-25% of an army that is made of conventional troops. With multiple castings you can get the damage close to 50%, and yes I have seen/done multiples many times.

As Pocus points out, one of the big effects is strategic. Once an enemy gets hit by MW/FFTS he tends to split his forces up to mitigate the potential damage. Now the attacker can focus while the enemy is split up.

I usually don't cast these spells to nail troops. I am almost always more interested in depleting the mage strength in the army. Many opponents use communion, relief, or wards. If I can knock out any part of a combo pre-battle it's worth almost any gem cost!

On the other hand... we are discussing Dom I, who can say what will happen in Dom II after players have worked the new system for months?