According to everything I have read, You should be able to cast summons on an orc pirate ship to damage it like you would with a cannon.
So I take my thrower out to kill pirates. I kill all the orcs but I am not even denting the pirate. So I bring in a caster and cast all sorts of summons on the ship. I usually get the message the ship resists your spell. I have 120 eval! Any idea what i am doing wrong?