I notice no one seems to mention using your heroic moment during this fight. It makes a huge difference! Also, don't run from his emperors voice, just interrupt it, he casts it really slowly, and your interrupt CD is so short u can interrupt it every time with ease. The rest is obvious, use your defensive CDs, bring Quinn (who should be geared) and burn him down using all relics, adrenals, stims, and medpacs you can bring to bear! I had no trouble at lvl 49, thought this fight was easier than Drahg actually.