Then I went Shockadin and ignored the defender and tried to dps down the Sha. The defender died twice, and I ran out of anvils.
Third time I dpsed but made sure the defender didn't die. I also killed the little adds and cleansed the debuff. That worked much better.
I just wish I remembered to turn the recording on at the start of the fight.
I expect that I'll have a better video when I do this again for my other paladin in a week or two.