Setup:
Try 4x tremor instead of throwing an earthbind in there.Although my healers have been pushing me to add an earthbind into my rotation so maybe I'm the one that needs to make the switch

Burst macro: I used to use the orc racial always but the 15 second MS is a heavy price to pay afterwards. In your situation it may be worth it though to push your spell damage up a lot higher.

Everything else on the list seems like you know what the game plan is. Also try not to use the burst combo unless your 90%+ sure it will drop the target.