I finally took the plunge and changed my spec. I tried and stayed 33/0/28 for our 2 nights in Mt Hyjal. I went deep in the arms tree to get MS and Blood Frenzy but also took some essential points in the protection tree.
This spec is purely for off-tanking and providing some dps and utility to the raid. With my gear level, tanking trash is not a problem. Looking at my tps, I am generating 600-700 which is low compared to my protection spec tps. But since we bring a bunch of tanks my target is usually the 2nd or 3rd amongs the kill order so threat wasn't be an issue. The priest who was healing me whispered me and told me that he didn't have any issues healing me on this spec which is always a good sign.
When it comes to dps, it really increased. I was able to do 600+ on the 1st boss and 800+ on the 2nd boss but I had WF so that might have bumped it up alittle bit.
All in all, I think the spec worked and I would be staying that way all of Mt Hyjal and possibly all of Black Temple too.
10 hours ago