Wouldn't constantly keeping up Stoneflesh Aura with Avatar Of Balthazar/armor of mist(for the downtime of Batlhs Avatar) give you a pretty much invincible build. Of course with some dmg skills mixed in with the rest, maybe some mystic regeneration and a mystic sweep or something like that for your dmg dealing.
Just a thought i had today while i saw for about the millionth time an E/D with some +armor spells and SFA+mystic regen.
Well, you would be better with E/D as they can get higher earth levels, and higher absorbtion. Most use ether renewal (or sandstorm for some dmg) as their elite, 40 armour from balth isn't going to make any difference.