To calculate the Necromages' damage we need to know the Relative Skill Level (RSL) of their missiles. This can be done by looking in the following table. Your Raise Skeletal Mage level is across the top, your Skeleton Mastery is along the left side. The box that meets up is your Relative Skill Level. If your Skeleton Mastery and Raise Skeletal Mage level is above 20, use the following formula to calculate your relative skill level: ('Skeleton Mastery'.lvl) + ((lvl < 4)?0:((lvl-2)/2)).