Prepared vs Demon Blades

[XxBlkArRoWxX 0]

Since the raid has come out, I have been using Demon Blades but looking at the Havok guide it says that Prepared is better in raid scenarios. I was just wondering, in your opinions which was better seeing as I've been consistently doing 210k+ DPS during every encounter in both normal and heroic. I haven't ever really tried Prepared so I have no knowledge of how much it changes things from what I'm doing now.

[dlhak 2]

I have switched to Demon Blades and I just did more dps,  the question I need an answer to is what is the haste cap for this talent ? I had issues with prepared especially on Cenarius.

[Rakenoth 1]

SAme here, i switched for Demon Blades and i see more dps, if around 3 week since i change prepared feel a lot better.