I've rolled up a fire/dark a while ago before really reading any guides (other than hearing it was an awesome build) - well, I'm totally in love with this particular char. ;-)
My question for AIM however - how long does the benefit from AIM last? A few seconds? 10? 15? Considering it has a base 90 second reset, how much can I expect to see in battle before I bif at a critical time (an EB or AV, for example)