Stone Guard strategy

First raid recap:

We had our first attempt at Stone Guard today. However, due to being down 1 tank and 1 healer, and having fill-ins, we found it pretty tough going.  The raids are currently tuned so that if we're  not in 489 gear already then we have to be doing pretty much everything perfect. A mistake will be a wipe.  But thanks to those people who did fill in, it at least gave us a chance to see the fight, and see where we can improve.

Links to important posts:

MoP raid rules and loot system (incl Flasks, and gems/enchants/reforge info)
Recommended Mods

We don't want to be wasting time updating mods or dealing with flasks or enchanting people's gear during the raid, please sort all this out beforehand.

Our Stone Guard strat:

EDIT: Since Rocksteady is such a beast, and our healing is weak,  I think it will be more practical to use a strat where Rock tanks 2 dogs the whole time. This will reduce the healing load. 

In this strat, the raid caller will just call "COBALT BY ITSELF" . That means that Rock will taunt whatever is currently on its own (assuming not Cobalt already of course), and the other tank taunts Cobalt. 

The one that will be on its own is the one that is neither petrifying, nor just exploded (it will be on about 50 energy). It would be nice if tanks taunted on their own without the call - then there is no wipe if the call is late :)

For the start of the fight, there will be two calls during the first phase so that we get the dogs to a 50-50 balanced state.