Formula for single hit damage

[vor_lord]

Wanted to update this thread as of patch 1.8 for the following instant abilities:

Whirlwind
Mortal Strike
Overpower
Sinister Strike
Backstab
Ambush

For instant attacks, as of 1.8 the speeds used are:
Daggers = 1.7 SPD
Other one hand = 2.4 SPD
Two hand = 3.3 SPD

Formula for single hit damage:


(WpMin + WpMax)/2 + AtkPwr*WpSpd/14


So damage range is the most important stat as of 1.8 for these skills.