I dunno, when I did mine, I just popped 2 destro pots (I think), Wings, and went balls to the wall on threat. No Sanc Aura, and I used normal tanking gear, with wizard oil, and a Flask of Blinding Light which probably put me up to around that 620-630 mark. From what I can see, I also used Sanctuary and Retribution Aura, which, while small, do add up. I also had 1 heroism. The spec I used was 2/5 reck, 3/3 precis, 2/2 imp judge.
I also don't use SoV, I find that I'll get higher threat just SoRing the whole way through, because Vengeance is just too fucking slow to get up, and my crazy warlocks and rogues would probably pull aggro and yell at me.
I've wanted to do this fight again with a Ret Pally, or my good buddy who is a shockadin for PvP in my group. I think it would be good times had by all.
Hope this helps ^_^
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Dark Serenity's tankadin for life.