Hey Hip,
You seem to be the busiest guy on the forums.
I haven't done a mastery build or tired one. What I can say on this is that I don't know if one is truely better then the other. Haste will give you more up time of SOR, but it won't stop as much inbound damage. With raid buffs I'm at about at about 48% physical damage reduction from SOR, with the 4 piece I would hit 58%, and to hit 100% is impossibe currently. That being said with the haste build I'm at about 4800 haste, which is giving me a little more the a 4 sec cooldown on CS, 5.3 sec on judgement and 8 sec on consencration. I feel that this allows me more control of inbound damage and I can create more threat on tank swaps (my tanking parnter is a dk). Cueerntly on Sha of fear (for example) I can SOR before every thrash and most of the time I can get 2 in. Haste will definately be the way to go in the future tiers when we can keep the physical damage debuff up 100% of the time.
This also helps with self heaing and BG stacking that extra 10% up to 5 times which comes in hand when needed.
"You say you switch to a stam trinket from haste on fights when you need it. What would be an example of such a fight?"
Windlord would be an example of when I would use 2 stam trinkets. I see that as where and extra 20k in health in the beginning of the fight could be the difference of survival. Heroic Elegon is another fight where I would use 2 stam trinkets. I feel that the added healh is beneficial when taking the additional damage from the boss when I take 2 breaths and have about 15-18 stacks of overcharged. I did upgrade my current stam trinket to add some additional health as the liquid courage is one of our bis trinkets. I have never seen the jade warlord trinket drop yet.
"What other fights are you making gear/talent/glyph changes for?"
I can make you a list on this one, but I'll pick 2 fights.
Tuslong- our Dk main tanks this fight, so I will swap in Holy Wrath, instead of Divine protection. I will move out during the healing part of the fight and help with stuns and interrupts on the small adds. I will also run holy avenger so I can get more use from sor to help get the adds down faster. By not using the DP glyph I can take less damage during the breath from Tsulong.
Wind Lord: I will run sanctified wrath (increased healing to me when AW is up) and 50% cooldown reduction on judgement, meaning more SOR usage. Then I use Lights Hammer as well for a 2 fold purpose. The first is for added damage to the adds and a bit of healing help, but when we just the boss up I will use that every time rain of blades happen to help with a little healing.
Glyphs I would change out would be Glyph of divine prot, and battle healer. The added cooldown is nice to have for the physical abuse, and battle healer is a good tool as I will swap from seal of right to insight once I have solid threat, or the healers are having a problem. When we have just the boss up I will swap to seal of truth for more damage, but I will swap to insight during rain of blades so I can be less of a healer focus.
"What seal are you typically running?"
Typically I run Seal of Truth, but I will use seal of right, when we have adds or trash, and then Seal of Insightwhen theer is a great deal of inbound damage like on H Elegon.
"Sacred shield uptime looks very good on some fights and significantly lower on others, why the disparity and what could you do to address this?"
The swing on sacred shield could be based on what I am doing in the fight, for example during the healing phase on Tsulong I bet it just about drops off as I'm more focused on the adds and I'm not tanking the large add (embodied terror). I actually found a week aura that I started using this week for that reason. When working on heroic progression I need to make sure that I can mitigate as much damage as possible.
It was great to hear form you and let me know if you have any more questions. I was also able to have a nice chat Ashin before xmas.