When Patch 3.0 hit all my gear was changed. I wasn't sure what to wear anymore.
Since I wanted to use the best gear for the job I went about making a spreadsheet to compare the items as they were reitemized.
Here is the full spreadsheet, formulas included. http://spreadsheets.google.com/pub?key=pxRKUgjn9TRr-KY-8OzuQRQ. I could have used WoWhead Item Weight formula, but the one they had for Protection Paladins was not properly weighted. If you'd like to download the spreadsheet, change formulas or add items, you can get it here: http://spreadsheets.google.com/pub?key=pxRKUgjn9TRr-KY-8OzuQRQ&output=xls
This assumes you are not hit capped and will have Touched By the Light, and the new Redoubt.
Where a piece had slots, I used Epic gems from Badges. You will see in parentheses next to each item what gem was used (sta = stamina).
The ranking was based on a series of formulas that looks at how the item budget contributes to Mitigation (Armor, Defense, Block Rating, Parry, Dodge, Block Value, Expertise, Str), and Threat (Stamina, Str, Hit, Spl Power, Block Value).
Then I take both the Mitigation Score and the Threat score and combine them to the overall score which is called "Add Threat".
They are grouped by Slot. Each slot is color coded so you can see the color coded blocks. Within the blocks, the highest scoring item is at the top and the lowest scoring item at the bottom.
The list has about 100 items, but it's far from a comprehensive and has a strong bias towards "Things Honorshammer had in his bags".
I am sharing the spreadsheet here. I'd love to get as much feedback as possible.
Most disturbing is that it looks like some current items are superior to Tempered Saronite, which is a 'blue' Blacksmith BoE crafted at Level 75. But we may need to wear Tempered Saronite due to it's high defense values and sacrifice the superior itemization on our current items.