Looking to start 10man naxx

Hey guys I just was curious if I'd be good go for 10 man naxx I was told it's not that hard i'd link my account but I'm at work
http://www.wowarmory.com/character-sheet.xml?r=Durotan&n=Lightshammer

at work edit* sorry if the link isnt working properly:(

It more reading up on the fights ahead of time that counts.

540 def? Good to go. The healers will do the rest.
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At 540 Defense, when the tooltip says you have 5.6% chance to be missed, you really have a 4.11%.