The Rogue has a skill that adds to critical chance and 98% to critical damage.
The formula for critical damage is 2x(hit)
The formula for rogues with Find weakness @ 10 is 2.98x(hit)
For example:
Assassinate @ 10 with (weapon equipped) will do 901 dmg max. (this is for my character) 901x2.98= 2685 damage