http://www.worldoflogs.com/reports/a...?s=5584&e=5892
Here are the logs from our kill (I'm the disc priest Vora). I am bad at using my SS but I found that doing what your priest is doing with the PW:S Spam is enough since I ranked on that parse. What stands out to me the most is the fight duration and how you guys are even making it close to the 8th minute. If you are having issues with the turtles at first, have your rogue go into Shuriken Toss and help the ranged out on the turtles. It is true, you are at a disadvantage for this fight based on your composition.
What we like to do is try to chain the debuff on the boss to increase DPS. With the first 3 turtles, we use the first to interrupt the breath, the second on the bats and we hold the third turtle for the next breath. That third turtle will interrupt the breath as long as usually hit the 3 new turtles, and chain like that. When we find a lull in the action and the boss has the debuff we pop lust, but popping lust at the start as effective. You guys didn't pop lust in your best attempt. Consider having your hunter respec into BM and pulling out a core hound as lust is a very good cooldown. Looking at the death logs, your priest died to the bats and then everyone else died to either rockfalls or getting knocked up and then getting rockfalled. Try spreading out more, a lot of groups don't use the wings of the room where the water is. If you guys made it to 4% then you can certainly do it, just try and have everyone try and push out a bit more numbers and use a bloodlust and you guys will get it!