Those 2 defile/Vlk phases that come right on top of each other are ment to do so. It's to throw your group and your timing off. It throws you a curve ball to make sure that you have responsible people in the raid. The ghost phase is another curveball - It's eas yas hell if people in your raid know what their doing but it puts alot of pressure on everyone to do things flawless one wrong move and you can kill 5 people. Thats why the fights hard compared to others we are going to have other fights that are like that soon when we start HM's it's not a tank and spank its do the mechanics and beat the encounter.