Board Thread:Game Discussion/@comment-217.36.238.185-20130624135010/@comment-158.68.216.245-20130624145928

The reason why your damage is not consistent is that your deck consists of raid cards with x5 or x10 attack. If those raid cards die early in the fight, your damage will be low, if they last until the end of the fight, they'll do a lot more damage. Crits make a difference but they'll average out over time and in long lasting fights will make less of an impact.

Also, I don't think bosses can crit, but I could be wrong.