More specifically, if I have an ability which has a normal cooldown of 10 seconds and I have maxed out the Sercery mastery at 5% CDR then the cooldown for that ability ill be 9.5 seconds. If I get Athene's and my CDR is now 25%, does the 20% from Athene's go off of the original 10 sec cooldown of the ability or off 9.5% the current cooldown of the ability?