I've always found the real trick to this fight is to have a single melee focus on attacking its back to force elbow drop and then dodge it. Prevents the ogre from doing other more devastating things.

The only other thing i constantly have to tell people is, When the Ogre Rages, Dont Run Away From Him!!!!! If the person with hate gets too far away from the Ogre he does a Cone AOE Fire Spit that can one shot people and will put everyone one to two hits away from death. You HAVE to walk.