approximating the nerf: looking at this parse -> http://parsely.io/parser/view/274090/0 Reduced the critical strike damage bonus granted by Sever from 15% to 10% Since all hits from devastating blast are critical should be able to just reduce the DPS contribution of devestating blast by 5% -> 2670.29 * .05 = 133.5145 dps decrease for massacre gotta see what percentage of massacre dps is crit damage: 61 MH hits * .541 crit * 9949.36 average crit damage = 328338.8 328338.8 MH crit dmg / 456575 total MH dmg = 71.9134% crit damage which will be reduced by 5% 1929.97 MH massacre dps * .719134 = 1387.922 dps from crit MH massacre * .05 = 69.39612 dps decrease blah blah with OH dmg gets 4.353676 dps decrease Reduced the damage bonus to Ataru Form attacks granted by Ataru Mastery from 5% to 3% 1322.82 dps from ataru form strikes * .02 dmg decrease = 26.4564 dps decrease totalling a 233.7207 dps decrease on a 10567.33 dps parse about a 2.2117% decrease. doesn't sound so bad looking at the percent. did I make any mistakes on the math there? does that seem about right?