I'm using Shield lob twice before I start my RoH combo. usually as soon as I land 2nd part combo, I will be ahead of everyone on the agro list.
also, the timing for dread is different for each group, (especially during 2nd phase, with Brain jack). in our group we put 3 people in Dread tower and he will pop when Brain jack has 3-5 sec left. I usually grab the hate after brain jack ware off.
also you can skip the 3rd dread if you push the boss below 45-46% before the 3rd Dread tower is up.