I tried this out last night with my 80 pally in reg VH. I have never tanked with this toon, it's my GB toon actually. I respecced into prot and bought the best equip I could, a good 20,000 gold's worth and went in. I held aggro nice, it was just the reg instance though, but it burned through mana in no time. I had to drink quick between each pull to get mana back up to full otherwise I'd be oom halfway though each mob. I am going to try this again today, maybe it was just bad luck or my gear/spec isn't good.