Become immune to Hagara the Stormbinder Water Entrenchment. While you are in the dome you can have a a feral druid use Stampeding Roar. Now you may wonder whats the exploit in that well if that druid is specc'd into the feral tree and has 2 points into Feral Swiftness this will remove the slow effect from Water Entrenchment to ALL raid members making them immune to the entire ability. At first we wondered why some of us were immune to it and after finding out what caused it we went to LFR to confirm it. I know this will be used for Heroic mode making the encounter super easy.
Also this works if you are Human or gnome on alliance and use your racial to remove impaired effect. And if you don't have a druid in the group you can use your PvP trinkets.
Watery Entrenchment – Any player standing within Hagara's water bubble drowns, inflicting damage equal to 15% of their maximum health every second and reducing their movement speed by 50%.
Feral Swiftness Rank 2 - In addition, your Dash and Stampeding Roar have a 100% chance to remove all movement impairing effects from affected targets when used.