What's The Lowest CD You Can Obtain?

[SpeckledBurd]

You can naturally get around 14% speed from super stacking, maybe 15%. We'll round 15% since it's easier.

That's -.375 ro 2.12 GCD.

Ninjas and Monks get the largest attack speed buff at 15%, so 2.12 x .85 = 1.80
Astros giving an improved Arrow at 15%, so 1.8 x .85 = 1.53
Scholars with 3% from Selene - 1.48

1.48 is approximately a 41% total haste increase.

It's my understanding that the game eventually locks your GCD from getting below a 1.5 GCD, though I don't recall where I heard that.