Altered Time - your #1 World of Warcraft Mage resource!

Hey everyone, so Trinket Sims say that Tarnished Sentinel Medallion is by far the best ST Trinket. I got it on 915 today and the On Use Effect triggers for about 3.8m Dmg, if i line it up with AP its 6m Dmg. Now i am wondering how i should use it the most efficient way. Delaying AP is not the thing ...