Stats Guide - Attack Speed
Last update: 11/29/2021
The Attack Speed (or "AS") stat reduces the animation time of your skills’ execution.
It will also add extra hits on channeling skills but won't modify their charging time*
*what means "channeling skill" here => a skill with a fixed lasting time and a dynamic scale circle appearing on the screen. Having more attack speed reduces the hit animation for these skills, and results in adding extra hits to them; don't confuse it with what I call "charging skills", with these requiring some charge time before release.
This stat becomes especially strong at high values coupled with Shorter Cooldown, and even more for some classes with powerful/numerous channeling skills (like Erwin, Stella, or Lily).
For those who aren't afraid of korean characters (or using Google Translate) and would like to get more info about AS scaling, you can read this thread on the korean forum.
In case of a choice to make between stats to add, this stat proportionally wins in strength among other multipliers in terms of long-term fights.