How many units can a unit kill in one turn?

We gather 300 peasants and go to raid Utopia... and then we storm a castle filled with titans...

This is a revolutionary change that will affect many things and make balancing and AI more complex.
For example, we will have to give dragons help in the form of some kind of support unit, or allow dragons to defeat many units at once.

And about the titans: don't leave a castle with only titans in it :)