Let me elucidate on crit % real quick, in case it wasn't obvious. Each unit, when doing a retaliation or normal attack has a chance to get a critical hit for additional damage. This total damage of a crit is equal to 150% of the upper number on the units damage range. For instance, a fire spider that does 4-5 damage will crit for 7.5 damage.
Just like how you can take an average on the base damage (4-5 averages to 4.5) you can also factor into that average the potential crit damage. A firespider has a crit rate of 15% (If I remember correctly). So it has a 15% chance to go from 4.5, to 7.5 damage. Or, to state it better, a 15% chance to do 3 more damage on average. So we'll simply add that into the average, and say it does .15*3+4.5 damage, or 4.95 damage on average.
That is the number you should use before doing your attack vs defense calculations. Since some untis (dryads) do crits very rarely (5% of the time) and others(bears) very often (25% of the time) it is a non trivial calculation.
Note that I quoted the exact damage and crit rates above off the top of my head, and could be wrong on the particulars, though I am sure of the process.
|