Some notes on
Cataclysm Tanking/Protection Field Manual :: Updated Feb 9, 2011 (4.0.6)
General
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Mastery “effectively” provides block rating (flat 30% damage reduction -> 40% with Holy Shield)
Every point of Mastery provides 2.25% of block
“blocks are no longer a fixed amount of mitigation but instead reduced damage by a certain percentage”
you are aiming for 102.4% avoidance - aka the block cap
Strength stat provides Parry rating
8% requires 961 Hit rating
Reforging
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Reforging: “If you are not at the block cap/full combat table coverage reforge—in this order—haste, crit, expertise, hit, dodge/parry into mastery”
Once you hit 102.4% block - consider dodge/parry - but remember not too much or they push block of the hit table
Never reforge into haste and crit
Glyphs (recommended ones)
Encounters
Pull by using

If single target use the following priority queue:

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(when active) >

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if AOE: Hammer of the Righteous >

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