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ArenaNet's Roy Cronacher has penned the next in a series of articles designed to show Guild Wars 2 players the changes coming to the game with the next update in late April. The update will see enhancements and rebalancing of many of the game's features including, in this case, Critical Damage with the addition of a new stat, 'ferocity'.
Ferocity will function very similarly to precision; both influence another stat. Just like your critical hit chance will go up as your precision increases, your bonus critical damage go up as you put more points into ferocity. As a result, critical damage will be displayed in manner that is consistent with the main stats on gear and skills, rather than just as a flat percentage.
All armors and weapons that currently provide a critical damage bonus will be updated to provide an equivalent amount of ferocity. As a bonus, you’ll notice that using ferocity as a stat is going to normalize critical damage across items so there isn’t a single item that’s clearly the best to equip for a critical damage boost. Areas such as trait lines, traits, and skills which provide critical damage have been rebalanced individually.
Read Cronacher's full post on the Guild Wars 2 blog.