Before I even knew about the los method(and before it was fixed) I beat him on normal and heroic letting 1-3 of my dps die during the first insanity and then letting them stay dead until after the second insanity then ankhing/druid res/keep hugging the ground. My tank can kills her adds easy and my healer can sustain himself until they're all gone. It's not pretty but it gets him killed.

I haven't tried this, but if you're healer's clone is giving you problems then supposedly running your healer away from the group before an insanity will make his clone spawn far away and give you a few bonus seconds to kill the others without them getting healed.