Faster Cast Rate

[whathuh]

This is from the sorceress faq in the AB.

FAQ: What are the faster hit recovery breakpoints for sorceresses?:

15fr 0-4% faster hit recovery
14fr 5-8%
13fr 9-13%
12fr 14-19%
11fr 20-29%
10fr 30-41%
09fr 42-59%
08fr 60-85%
07fr 86-141%
06fr 142-279%
05fr 280+%

So this last bold portion, even though it is difficult to achieve, is still a 6 frame GetHit?

And finally, I just can't figure out what all the variables are in the formula.

FastCast Ticks= {256*Base/[Animation(100+EFCR)/100]}-1

The Base, from what I understand, is the base frames with 0 FCR +1. So the Base for a sorceress casting teleport is 14. EFCR is, of course, the effective FCR capped at 75. Finally, the animation is the animspeed or animrate? Usually it is simply 256, which it is for teleport, fireball, etc... There has got to be something I am missing in this formula because it does not work correctly when the Base = 20 and the Animation = 256. This is simply the Amazon's casting rate.

So what are the sequence animation speed and animation length, and where do they fit into the formula?

I tried my best to follow what EAX, EBX, ECX, EDX, animrate, animation speed, and animation length all were in your AB post, but I failed miserably.