Talk:Mastery/@comment-60.242.127.171-20111117102830/@comment-62.163.167.91-20111117144720

I dunno how you calculate, but afaik that percentage is subtracted from any incoming dmg. So for instance you get hit by a 1K crit, that mastery takes off 15 dmg of off that. Sure, that still sucks, but that does mean it's worth more than 0.5 armor. Also the damage reduction also works on true dmg, not just magic or physical. That said Havoc in the mastery tree is the offensive brother and gives 0.5/1/1.5% extra dmg, so basically they are designed to cancel each other out, just like most other points in both offense and defense trees, as far as I can see.