if you have a rogue or hunter that is doing tricks/misdirect to you then missing at the beginning shouldn't be anything more than an annoyance. The only thing that should really cause significant drain on your rage is heroic strike, so if you miss your opening shield slam or devastate, just make sure not to hit heroic strike and instead try to get in extra devastates/revenges/shield slams instead of dumping rage on heroic strike. Make sure (if you can) you use charge and put up your shout so that you have rage.
http://www.wowhead.com/talent#LhbcZZIfGzMRobbu <- that should be your base spec. There's 2 points floating, where you put those are kind of up in the air. If there' some fight where you need another cooldown for the other tank you could spec safeguard, but I never have used it. Vigilance is nice for the trash on ultraxion, but that's the only time I've ever really wanted it. I usually just spec 2 points into cruelty in the fury tree.
If you miss in the beginning you can also just taunt to make sure the boss focuses you for another 3 seconds and it gives you a few more globals to try and land some attacks without losing threat or spending more rage.
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