This is what I do.
* stack up on block value kit. 700+ if possible.
* be in battle stance and have a full rage bar before they appear.
* use spell reflection to nuke 30% of their health per spell
* activate gnomeregan auto-blocker before the first shield slam.
* drink rage pot during fight.
* use good sharpening stone before fight.
* have damage buffing food and/or pots.
I've made it a few times like this. But have failed a few times too when he appears to have resisted my reflect.
-- gyre --