Might I suggest the following modification of your GCD AoE rotation?

Shield Lob
Flash (Applies Blind for 12 sec)
Flash (does not replace Blind)
Goring Blade Combo on a target
Flash (Applies Blind for 6 sec)
Flash (does not replace Blind)
Goring Blade Combo on a target that does not have the DoT
Flash (Applies Blind for 3 sec)
Goring Blade/Royal Authority/Rage of Halone until all targets are dead.

Pop Circle of Scorn and Spirits Within on cool down.
Use Fight or Flight once you start heavily on your Melee Rotations. Popping it before a pull or during Flash causes you to lose up time to no effect.