The Impatience gold modification decreases the cooldown to 40 seconds, and does not scale. The Delay silver modification extends duration based on the Combat Art level. With the Delay (increase duration) and Impatience (decrease cooldown) modifications, the duration begins to exceed the cooldown at CA level 75. At this point, it becomes practical to maintain Dashing Alacrity continuously.
Duration above 45-50 seconds is rather difficult to achieve because of the Maximum Spell Level Without Penalty effects and diminishing returns, so this Combat Art needs to be recast very often.
Note that, like all CA's in the Exalted Warrior aspect, casting speed is determined by weapon speed, and can be boosted by weapon lore skills and +% attack speed. Likewise, the casting speed will be penalized by wielding a weapon with too high a level.
Pros and Cons
Increases attack, casting and run speed by a large amount, which at early levels especially is very useful
Allows the player to neglect certain stats on gear like run speed, attack speed or casting speed.
Has to be recast alot to maintain optimal effect.
Duration is 20 + 0.01*CA-Lvl seconds and 30 + 0.02*CA-Lvl seconds with Delay.
The chance to block rooting spells is ~20% and increases with each CA level.
Attack speed is increased by 14.7 + 0.3*CA-Lvl percentage points and 24.7 + 0.6*CA-Lvl percentage points with Bloodlust.
Run speed is increased by 14.7 + 0.3*CA-Lvl percentage points and 24.7 + 0.6*CA-Lvl percentage points with Sprout.