We're currently 10/12 Heroic in 10 ICC and are going to attempt Sinny this weekend. Last weekend was our first attempts on Heroic PP and we killed him after about 6-7 attempts. Now with the 30% buff I'm hoping Sinny will be even easier, then it's onward to the mount next week.
Seriously though, the only difference that's worth mentioning is the Instability AoE damage right? Since it's 30% buff time, is it ideal to just have whoever gets Unchained Magic to just run out and not cast at all? Thus removing the risk of Instability AoE? I know the AoE one shots people as well in Heroic, is it still normal for tanks to take it to the face? I myself am a DK, so I typically just pop Anti-Magic Shield and absorb it all on normal.