I normally try and use heroic strike when i got 60 rage or more. Other than that yeh whirlwind and then bloodthirst and ww when they are rdy and use slam when it procs. Atm I don't even use execute as it is a waste of rage when it does less damage than my bloodthirst.
With the new changes to execute, I have been finding that sub 20% execute seems to be a better rage dump. I also ignore slam procs at that point. If I have the GCD to use, I execute.