alacrity reduces cast times as cast_time=original_cast_time/(1+alacrity_percent*100)

to find when 1.5 becomes 1.3 we solve the following equations:

1.5/(1+x)=1.3 which gives x=.153846, which is 15.38 %

the equations from 1.5 PTS are here: http://www.swtor.com/community/showthread.php?t=966583

using the equation for alacrity we get

percent rating = cap* ( 1 - ( 1 - ( 1 / cap) )^( (rating/75 ) / divisor) )

15.38 = 30*( 1 - ( 1 - ( 1 / 30) )^( (rating/75 ) / 2.015) ) solving for rating gives 3204.

I have been doing some testing and I believe the alac cap for GCD being 1.3 seconds has been changed from 15,40% to 15,30%. Can you confirm?

It was 15.384615% and still remains 15.384615%. The only noted change is the amount of alacrity needed to reach 15.38% (currently 1857, soon to be 3206). However I havent seen confirmation that GCD is only affected at 1.4 vs 1.3, or if you could potentially go between them and have a GCD of 1.31-1.39.

It was 15.384615% and still remains 15.384615%. The only noted change is the amount of alacrity needed to reach 15.38% (currently 1857, soon to be 3206). However I havent seen confirmation that GCD is only affected at 1.4 vs 1.3, or if you could potentially go between them and have a GCD of 1.31-1.39.

i honestly havent seen compelling evidence of this on live either...

what i would like to see if someone using only their auto attack, 10 parses with no alacrity, 10 parses with 1.45 gcd, 10 with 1.4 gcd. then we compare apm and total number of auto attacks in a 5 minute span and see if there is statistically significant difference.

i honestly havent seen compelling evidence of this on live either...

 

what i would like to see if someone using only their auto attack, 10 parses with no alacrity, 10 parses with 1.45 gcd, 10 with 1.4 gcd. then we compare apm and total number of auto attacks in a 5 minute span and see if there is statistically significant difference.

There are plenty of these logs for the live version available on the web. Not so much for PTS logs though.

abilities that do dot damage over time as well as some channeled abilities that do damage every "interval" in the channel are not rounded to 1/10th intervals but are calculated with more steps.

channeled abilities that do one hit after the channel are however rounded.

so on say a marksman sniper, or any class that does not care about dot damage I would always be exactly at a 1/10th break point - either 1.4 or 1.3 gcd.

on dot based classes the area of optimization is more gray. if I can get to 1.3 gcd without going under 40-41% crit chance I would go for it. Otherwise a traditional 2-1 crit to alacrity ratio (like 3000 crit/ 1500 alac) seems to get the best average results.