I didn't get to see your tank setup you were logged out in ret. Unlike Ret you will not care about Expertise or Hit unless as the tank you are on interrupt duty then you will need to cap hit. This is at a direct loss to competitiveness in the ability to take damage though.
Mastery is king and gear with Mastery/Parry or Mastery/Dodge as secondary stats is what you are after now. You might want to put some pieces with HIT in the bank as you take it off incase you want to meet your hit cap again. (I prefer to not be on interrupt duty but I am prepared to do whatever it takes without complaint so if I am asked I can do it.)
Rotation is a priority order but we need an opening rotation for initial threat because some of our threat comes from actually getting hit. So we come out swinging hard using Avenging Wrath + Inquisition is the idea. We fire Divine Plea if spec'd to get 3 HoPo so we have enough to fire Inquisition you want to cancelaura fast on DP because it reduces healing. DP, CancelAura, AW, Inq, AS, 939 "I use trinkets here also"
You can spec into some party buffs and holy radiance. This is a macro for me I fire what's left of my buffs when the healers are beginning to work hard.. If the fight goes long enough I at least fire Avenging Wrath again.
There's no stronger attack rotation then building 3 Holy Power and firing Shield of the Righteous. Holy Power also comes from Hammer of the Righteous unlike Ret spec.. Everything else is fillers using the highest damage filler possible while also remembering to cast Judgement often. It is cake compared to Ret..
One very important aspect I can think of right now is Holy Shields which can be generated by Inquisition, WoG, or firing SoTR depending on your setup. Holy Shields reduces incoming damage by 10% but it refreshes when you renew it so off/on.. I don't like that so I really try to always fire 3 Holy Power for the longest up time..
This is turning into a book..