I was able to clear the whole dungeon last night. What did it was switching my priest back to her holy spec. Disc was not viable at all (at least for me) in terms of healing power. Holy is so much better. I played holy all through wrath heroics but wanted to see how disc would perform with added DPS and healing. Turns out the DPS was not really a big factor, but healing was...

Thanks for all the tips. I wouldn't say it's on farm by any mean but at least I now have access to orbs to start making better gear for my tank