For pack of mobs this is how I do it. Say you have 3 mobs. I mark them 1, 2, 3. Main target is 1. I provoke 2, shield lob 3 then flash and focus on 1. After every rotation of fast blade, savage blade, and rage I flash. If you have a blm have him sleep the other ones as well and just flash every so often to keep that hate up.