I usually pop invigorate right when I enter than run around circle behind him.
Sentinel->Provoke->Flash->Rampart->Combo (with flatblade)->Outmaneuver/rinse and repeat
This is pretty much the answer. I pop Invigorate as soon as I enter, run around the ring, get in position, pull out my weapon and wait for the first strike. Then I pop Sentinel, Rampart, Provoke, Flash, Enmity Combo with Keen Flurry, Enmity Combo, then repeat skills when up. Eventually, you'll have tons of hate and not need to grind the hate train. This works for both GLA and MRD.
Enmity materia helps. I'd recommend a belt with it on it. Edited, Feb 7th 2012 7:08pm by SFChakan