Found this, posted by Krrios...
On Test Center today I've collected sample data of casting speeds for
paladin spells. Spells were cast in succession 20 times, and the time taken
to do that was measured. This was repeated for multiple fast-cast and
fast-cast-recovery rates.
When examining the sample rates, a simple algorithm emerged:
Cast Delay = (SpellLevel - FC) / 4 <min 0.5>
Recovery Delay = (7 - FCR) / 4
Here is a table of spell levels:
2: Dispel Evil
3: Consecrate Weapon, Enemy of One
4: Holy Light
5: Divine Fury, Cleanse By Fire
7: Noble Sacrifice, Close Wounds, Remove Curse, Sacred Journey
Each FC/R level acts to decrease the Delay by one fourth of a second
(0.25). There are some interesting things about this algorithm.
First, the cast Delay has a minimum value of half a second (0.5). As a
result, casting Dispel Evil for example, is not influenced at all by FC 1+.
Consecrate Weapon and Enemy of One will benefit from FC 1, but not FC 2+.
I am not aware if the recovery Delay has a minimum value, as to test that I
would need an FCR 6 suit. I don't have such a suit. src="/php-bin/shared/images/icons/wink.gif">
Secondly, it is interesting to note that the recovery Delay is not at all
influenced by the spell level. At 0 FCR, the recovery Delay will always be
1.75 seconds ((7 - 0) / 4). Also, for non-target spells, the recovery Delay
is not applied if you fizzle; you can fizzle dispel evil two times a
second, but once you succeed, you must wait another 1.75 seconds before
trying to cast again.
Here's a table detailing the casting Delays:
-3 FC -2 FC -1 FC 0 FC 1 FC 2 FC 3 FC 4 FC 5 FC 6 FC
Dispel Evil 1.25 1.00 0.75 0.50 0.50 0.50 0.50 0.50 0.50 0.50
Consecrate Weapon 1.50 1.25 1.00 0.75 0.50 0.50 0.50 0.50 0.50 0.50
Enemy of One 1.50 1.25 1.00 0.75 0.50 0.50 0.50 0.50 0.50 0.50
Holy Light 1.75 1.50 1.25 1.00 0.75 0.50 0.50 0.50 0.50 0.50
Divine Fury 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50 0.50 0.50
Cleanse By Fire 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50 0.50 0.50
Noble Sacrifice 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50
Close Wounds 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50
Remove Curse 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50
Sacred Journey 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.50
One thing we can see from this is that there is no benefit past 5 FC for
even the highest level spells.
Also, a table of the recovery Delays: Note, this assumes no minimum
recovery Delay
0 FCR 1 FCR 2 FCR 3 FCR 4 FCR 5 FCR 6 FCR 7 FCR
Recovery Delay 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00