Let me know how to do this. Ive only got him down to less than half with a sword every time I use it. Is it better to just ground pound with the sword? I combo then ground pound.

Now, I'm not a 32 myself yet, but our sword guy on my raid team has done it on one sword. I think he does one of the combos and ground pounds the rest. It's mostly timing though. You want to start hitting him while he's actually still standing up just before he's about to go down.